Russian phonology

This article discusses the phonological system of standard Russian based on the Moscow dialect (unless otherwise noted). For an overview of dialects in the Russian language, see Russian dialects. Most descriptions of Russian describe it as having five vowel phonemes, though there is some dispute over whether a sixth vowel, [ɨ], is separate from /i/. Russian has 34 consonants, which can be divided into two types:

• hard (твёрдый [ˈtvʲɵrdɨj] ) or plain
• soft (мягкий [ˈmʲæxʲkʲɪj]) or palatalized

Russian also distinguishes hard consonants from soft (palatalized) consonants and from consonants followed by /j/, making four sets in total: /C Cʲ Cj Cʲj/, although /Cj/ in native words appears only at morpheme boundaries. Russian also preserves palatalized consonants that are followed by another consonant more often than other Slavic languages do. Like Polish, it has both hard postalveolars (/ʂ ʐ/) and soft ones (/tɕ ɕː ʑː/).

Russian has vowel reduction in unstressed syllables. This feature also occurs in a minority of other Slavic languages like Belarusian and Bulgarian, and is also found in English, but not in most other Slavic languages, such as Czech, Polish and most varieties of Serbo-Croatian.

Vowels

Vowel phonemes

	Front	Central	Back
Close	i	(ɨ)	u
Mid	e		o
Open		a

Russian vowel chart by Jones & Trofimov (1923:55).

Russian stressed vowel chart according to their formants and surrounding consonants, from Timberlake (2004:31, 38). C is hard (non-palatalized) consonant, Ç is soft (palatalized) consonant. This chart uses frequencies to represent the basic vowel triangle of the Russian language.

Russian has five to six vowels in stressed syllables, /i, u, e, o, a/ and in some analyses /ɨ/, but in most cases these vowels have merged to only two to four vowels when unstressed: /i, u, a/ (or /ɨ, u, a/) after hard consonants and /i, u/ after soft ones.

A long-standing dispute among linguists is whether Russian has five vowel phonemes or six; that is, scholars disagree as to whether [ɨ] constitutes an allophone of /i/ or if there is an independent phoneme /ɨ/. The five-vowel analysis, taken up by the Moscow school, rests on the complementary distribution of [ɨ] and [i], with the former occurring after hard (non-palatalized) consonants and [i] elsewhere. The allophony of the stressed variant of the open /a/ is largely the same, yet no scholar considers [ä] and [æ] to be separate phonemes (which they are in e.g. Slovak).

The six-vowel view, held by the Saint-Petersburg (Leningrad) phonology school, points to several phenomena to make its case:

• Native Russian speakers' ability to articulate [ɨ] in isolation: for example, in the names of the letters ⟨и⟩ and ⟨ы⟩.
• Rare instances of word-initial [ɨ], including the minimal pair и́кать 'to produce the sound и' and ы́кать 'to produce the sound ы'), as well as borrowed names and toponyms, like Ыб [ɨp] , the name of a river and several villages in the Komi Republic.
• Morphological alternations like гото́в [ɡʌˈtof] ('ready' predicate, m.) and гото́вить [ɡʌˈtɵvʲɪtʲ] ('to get ready' trans.) between palatalized and non-palatalized consonants.

The most popular view among linguists (and that taken up in this article) is that of the Moscow school, though Russian pedagogy has typically taught that there are six vowels (the term phoneme is not used).

Reconstructions of Proto-Slavic show that *i and *y (which correspond to [i] and [ɨ]) were separate phonemes. On the other hand, numerous alternations between the two sounds in Russian indicate clearly that at one point the two sounds were reanalyzed as allophones of each other.

Allophony

A quick index of vowel pronunciation

Phoneme	Letter (typically)	Position	Stressed	Reduced
/i/	и	(Cʲ)V(C)	[i]	[ɪ]
	ы, и	(C)V	[ɨ]
/u/	у	(C)V	[u]	[ʊ]
		(C)VCʲ
	ю	CʲV	[ʉ]
/e/	э	VC	[ɛ]	[ɪ]
	е	CʲV	[e]
	э, е†	CVC	[ɛ]	[ɨ]
		CVCʲ	[e]
/o/	о	(C)V	[o]	[ə], [ʌ]
		(C)VCʲ	[ɵ]
	ё*	CʲV		[ɪ]
/a/	а	(C)V	[ä]	[ə], [ʌ]
		(C)VCʲ
	я	CʲV	[æ]	[ɪ]
* Reduced ⟨ё⟩ is written as ⟨е⟩. † ⟨е⟩ is mostly used in loanwords (except if word-initial) or after ц, ш, ж.

Russian vowels are subject to considerable allophony, subject to both stress and the palatalization of neighboring consonants. In most unstressed positions, in fact, only three phonemes are distinguished after hard consonants, and only two after soft consonants. Unstressed /o/ and /a/ have merged to /a/ (a phenomenon known as Russian: а́канье); unstressed /i/ and /e/ have merged to /i/ (Russian: и́канье); and all four unstressed vowels have merged after soft consonants, except in absolute final position in a word. None of these mergers are represented in writing.

Front vowels

When a preceding consonant is hard, /i/ is retracted to [ɨ]. Formant studies in Padgett (2001) demonstrate that [ɨ] is better characterized as slightly diphthongized from the velarization of the preceding consonant, implying that a phonological pattern of using velarization to enhance perceptual distinctiveness between hard and soft consonants is strongest before /i/. When unstressed, /i/ becomes near-close; that is, [ɨ̞] following a hard consonant and [ɪ] in most other environments. Between soft consonants, stressed /i/ is raised, as in пить [pʲi̝tʲ]  ('to drink'). When preceded and followed by coronal or dorsal consonants, [ɨ] is fronted to [ɨ̟]. After a cluster of a labial and /ɫ/, [ɨ] is retracted, as in плыть [pɫɨ̠tʲ] ('to float'); it is also slightly diphthongized to [ɯ̟ɨ̟].

In native words, /e/ only follows unpaired (i.e. the retroflexes and /ts/) and soft consonants. After soft consonants (but not before), it is a mid vowel [ɛ̝] (hereafter represented without the diacritic for simplicity), while a following soft consonant raises it to close-mid [e]. Another allophone, an open-mid [ɛ] occurs word-initially and between hard consonants. Preceding hard consonants retract /e/ to [ɛ̠] and [e̠] so that жест ('gesture') and цель ('target') are pronounced [ʐɛ̠st] and [tse̠lʲ] respectively.

In words borrowed from other languages, /e/ rarely follows soft consonants; this foreign pronunciation often persists in Russian for many years until the word is more fully adopted into Russian. For instance, шофёр (from French chauffeur) was pronounced [ʂoˈfɛr] in the early twentieth century, but is now pronounced [ʂʌˈfʲɵr]. On the other hand, the pronunciations of words such as отель [ʌˈtelʲ] ('hotel') retain the hard consonants despite a long presence in the language.

Back vowels

Between soft consonants, /a/ becomes [æ], as in пять [pʲætʲ]  ('five'). When not following a soft consonant, /a/ is retracted to [ɑ̟] before /l/ as in палка [ˈpɑ̟ɫkə] ('stick').

For most speakers, /o/ is a mid vowel [o̞], but it can be more open [ɔ] for some speakers. Following a soft consonant, /o/ is centralized and raised to [ɵ] as in тётя [ˈtʲɵtʲə] ('aunt').

As with the other back vowels, /u/ is centralized to [ʉ] between soft consonants, as in чуть [tɕʉtʲ] ('narrowly'). When unstressed, /u/ becomes near-close; central [ʉ̞] between soft consonants, centralized back [ʊ] in other positions.

Unstressed vowels

Russian unstressed vowels have lower intensity and lower energy. They are typically shorter than stressed vowels, and /a e o i/ in most unstressed positions tend to undergo mergers for most dialects:

• /o/ has merged with /a/: for instance, валы́ 'bulwarks' and волы́ 'oxen' are both pronounced /vaˈɫi/, phonetically [vʌˈɫɨ].
• /e/ has merged with /i/: for instance, лиса́ (lisá) 'fox' and леса́ 'forests' are both pronounced /lʲiˈsa/, phonetically [lʲɪˈsa].
• /a/ and /o/ have merged with /i/ after soft consonants: for instance, ме́сяц (mésjats) 'month' is pronounced /ˈmʲesʲits/, phonetically [ˈmʲesʲɪts].

The merger of unstressed /e/ and /i/ in particular is less universal in the pretonic (pre-accented) position than that of unstressed /o/ and /a/. For example, speakers of some rural dialects as well as the "Old Petersburgian" pronunciation may have the latter but not the former merger, distinguishing between лиса́ [lʲɪˈsa] and леса́ [lʲɘˈsa], but not between валы́ and волы́ (both [vʌˈɫɨ]). The distinction in some loanwords between unstressed /e/ and /i/, or /o/ and /a/ is codified in some pronunciation dictionaries (Avanesov (1985:663), Zarva (1993:15)), for example, фо́рте [ˈfortɛ] and ве́то [ˈvʲeto].

is sometimes preserved word-finally, for example in second-person plural or formal verb forms with the ending -те, such as де́лаете ("you do") /ˈdʲeɫajitʲe/ (phonetically [ˈdʲeɫə(j)ɪtʲe]).|date=July 2017}}

As a result, in most unstressed positions, only three vowel phonemes are distinguished after hard consonants (/u/, /a ~ o/, and /e ~ i/), and only two after soft consonants (/u/ and /a ~ o ~ e ~ i/). For the most part, Russian orthography (as opposed to that of closely related Belarusian) does not reflect vowel reduction. This can be seen in Russian не́бо (nébo) as against Belarusian не́ба (néba) "sky", both of which can be phonemically analyzed as /ˈnʲeba/.

Vowel mergers

In terms of actual pronunciation, there are at least two different levels of vowel reduction: vowels are less reduced when a syllable immediately precedes the stressed one, and more reduced in other positions. This is particularly visible in the realization of unstressed /o/ and /a/, where a less-reduced allophone [ʌ] appears alongside a more-reduced allophone [ə].

The pronunciation of unstressed /o ~ a/ is as follows:

1. [ʌ] (sometimes transcribed as [ɐ]; the latter is phonetically correct for the standard Moscow pronunciation, whereas the former is phonetically correct for the standard Saint Petersburg pronunciation; this article uses only the symbol [ʌ]) appears in the following positions:
   • In the syllable immediately before the stress, when a hard consonant precedes: паро́м [pʌˈrom]  ('ferry'), трава́ [trʌˈva] ('grass').
   • In absolute word-initial position.
   • In hiatus, when the vowel occurs twice without a consonant between; this is written ⟨aa⟩, ⟨ao⟩, ⟨oa⟩, or ⟨oo⟩: сообража́ть [sʌʌbrʌˈʐatʲ] ('to use common sense, to reason').
2. [ə] appears elsewhere, when a hard consonant precedes: о́блако [ˈobɫəkə] ('cloud').
3. When a soft consonant or /j/ precedes, both /o/ and /a/ merge with /i/ and are pronounced as [ɪ]. Example: язы́к [jɪˈzɨk] 'tongue'). /o/ is written as ⟨e⟩ in these positions.
   • This merger also tends to occur after formerly soft consonants now pronounced hard (/ʐ/, /ʂ/, /ts/), where the pronunciation [ɨ̞] occurs. This always occurs when the spelling uses the soft vowel variants, e.g. жена́ [ʐɨ̞ˈna]  ('wife'), with underlying /o/. However, it also occurs in a few word roots where the spelling writes a hard /a/. Examples:
     • жал- 'regret': e.g. жале́ть [ʐɨˈlʲetʲ] ('to regret'), к сожале́нию [ksəʐɨˈlʲenʲɪjʉ] ('unfortunately').
     • ло́шадь 'horse', e.g. лошаде́й, [ɫəʂɨˈdʲej] (pl. gen. and acc.).
     • -дцать- in numbers: e.g. двадцати́ [dvətsɨˈtʲi] ('twenty [gen., dat., prep.]'), тридцатью́ [trʲɪtsɨˈtʲjʉ] ('thirty [instr.]').
     • ржано́й [rʐɨˈnɵj] ('rye [adj. m. nom.]').
     • жасми́н [ʐɨˈsmʲin] ('jasmine').
4. These processes occur even across word boundaries as in под морем [pʌd‿ˈmɵrʲɪm] ('under the sea').

The pronunciation of unstressed /e ~ i/ is [ɪ] after soft consonants and /j/, and word-initially (эта́п [ɪˈtap] ('stage')), but [ɨ̞] after hard consonants (дыша́ть [dɨ̞ˈʂatʲ] ('to breathe')).

There are a number of exceptions to the above vowel-reduction rules:

• Vowels may not merge in foreign borrowings, particularly with unusual or recently borrowed words such as ра́дио, [ˈradʲɪo]  'radio'. In such words, unstressed /a/ may be pronounced as [ʌ], regardless of context; unstressed /e/ does not merge with /i/ in initial position or after vowels, so word pairs like эмигра́нт and иммигра́нт, or эмити́ровать and имити́ровать, differ in pronunciation. *Across certain word-final inflections, the reductions do not completely apply. For example, after soft or unpaired consonants, unstressed /a/, /e/ and /i/ of a final syllable may be distinguished from each other. For example, жи́тели [ˈʐɨtʲɪlʲɪ] ('residents') contrasts with both (о) жи́теле [(ʌ) ˈʐɨtʲɪlʲɪ̞] ('[about] a resident') and жи́теля [ˈʐɨtʲɪlʲə] ('of a resident').
• If the first vowel of ⟨oa⟩, or ⟨oo⟩ belongs to the conjunctions но ('but') or то ('then'), it is not reduced, even when unstressed.

Other changes

Unstressed /u/ is generally pronounced as a lax (or near-close) [ʊ], e.g. мужчи́на [mʊˈɕːinə]  ('man'). Between soft consonants, it becomes centralized to [ʉ̞], as in юти́ться [jʉ̞ˈtʲitsə] ('to huddle').

Note a spelling irregularity in /s/ of the reflexive suffix -ся: with a preceding -т- in third-person present and a -ть- in infinitive, it is pronounced as [tsə], i.e. hard instead of with its soft counterpart, since [ts], normally spelled with ⟨ц⟩, is traditionally always hard. In other forms both pronunciations [sə] and [sʲə] alternate for a speaker with some usual form-dependent preferences: in the outdated dialects, reflexive imperative verbs (such as бо́йся, lit. "be afraid yourself") may be pronounced with [sə] instead of modern (and phonetically consistent) [sʲə].

In weakly stressed positions, vowels may become voiceless between two voiceless consonants: вы́ставка [ˈvɨstə̥fkə] ('exhibition'), потому́ что [pə̥tʌˈmu ʂtə] ('because'). This may also happen in cases where only the following consonant is voiceless: че́реп [ˈtɕerʲɪ̥p] ('skull').

Phonemic analysis

Because of mergers of different phonemes in unstressed position, the assignment of a particular phone to a phoneme requires phonological analysis. There have been different approaches to this problem:

• The Saint Petersburg phonology school assigns allophones to particular phonemes. For example, any [ʌ] is considered as a realization of /a/.
• The Moscow phonology school uses an analysis with morphophonemes (морфоне́мы, singular морфоне́ма). It treats a given unstressed allophone as belonging to a particular morphophoneme depending on morphological alternations, or on etymology (which is often reflected in the spelling). For example, [ʌ] is analyzed as either |a| or |o|. To make a determination, one must seek out instances where an unstressed morpheme containing [ʌ] in one word is stressed in another word. Thus, because the word валы́ [vʌˈɫɨ] ('shafts') shows an alternation with вал [vaɫ] ('shaft'), this instance of [ʌ] belongs to the morphophoneme |a|. Meanwhile, волы́ [vʌˈɫɨ] ('oxen') alternates with вол [voɫ] ('ox'), showing that this instance of [ʌ] belongs to the morphophoneme |o|. If there are no alternations between stressed and unstressed syllables for a particular morpheme, then the assignment is based on etymology.
• Some linguists prefer to avoid making the decision. Their terminology includes strong vowel phonemes (the five) for stressed vowels plus several weak phonemes for unstressed vowels: thus, [ɪ] represents the weak phoneme /ɪ/, which contrasts with other weak phonemes, but not with strong ones.

Diphthongs

Russian diphthongs all end in a non-syllabic [i̯], an allophone of /j/ and the only semivowel in Russian. In all contexts other than after a vowel, /j/ is considered an approximant consonant. Phonological descriptions of /j/ may also classify it as a consonant even in the coda. In such descriptions, Russian has no diphthongs.

The first part of diphthongs are subject to the same allophony as their constituent vowels. Examples of words with diphthongs: яйцо́ [jɪjˈtso]  ('egg'), ей [jej] ('her' dat.), де́йственный [ˈdʲejstvʲɪnnɨj] ('effective'). /ij/, written ⟨-ий⟩ or ⟨-ый⟩, is a common inflexional affix of adjectives, participles, and nouns, where it is often unstressed; at normal conversational speed, such unstressed endings may be monophthongized to [ɪ̟].

Consonants

⟨ʲ⟩ denotes palatalization, meaning the center of the tongue is raised during and after the articulation of the consonant. Phonemes that have at different times been disputed are enclosed in parentheses.

Consonant phonemes

		Labial		Dental, Alveolar		Post- alveolar	Palatal	Velar
		hard	soft	hard	soft	hard	soft	hard	soft
Nasal		m	mʲ	n	nʲ
Stop	voiceless	p	pʲ	t	tʲ			k	(kʲ)
	voiced	b	bʲ	d	dʲ			ɡ	(ɡʲ)
Affricate				ts	(tsʲ)		tɕ
Fricative	voiceless	f	fʲ	s	sʲ	ʂ	ɕː	x	(xʲ)
	voiced	v	vʲ	z	zʲ	ʐ	(ʑː)	(ɣ)
Approximant				ɫ	lʲ		j
Trill					rʲ	r

Notes

• Most consonant phonemes come in hard–soft pairs, except for always-hard /ts, ʂ, ʐ/ and always-soft /tɕ, ɕː, j/ and formerly /ʑː/. There is a marked tendency of Russian hard consonants to be velarized, though this is a subject of some academic dispute. Velarization is clearest before the front vowels /e/ and /i/.
  • /ʐ/ and /ʂ/ are always hard in native words (even if spelling contains a "softening" letter after them, as in жена, шёлк, жить, мышь, жюри, парашют etc.), and for most speakers also in foreign proper names, mostly of French or Lithuanian origin (e.g. Гёльджюк [ˈɡʲɵlʲdʐʊk], Жён Африк [ˈʐon ʌˈfrʲik], Жюль Верн [ˈʐulʲ ˈvɛrn], Герхард Шюрер [ˈɡʲerxərt ˈʂurɨr], Шяуляй, Шяшувис) and tend to be always at least slightly labialized, including when followed by unrounded vowels. Long phonemes /ʑː/ and /ɕː/ do not pattern in the same ways that other hard–soft pairs do. ** /ts/ is generally listed among the always-hard consonants; however, certain foreign proper names, including those of Ukrainian, Polish, Lithuanian, or German origin (e.g. Цюрупа, Пацюк, Цявловский, Цюрих), as well as loanwords (e.g., хуацяо, from Chinese) contain a soft [tsʲ]. The phonemicity of a soft /tsʲ/ is supported by neologisms that come from native word-building processes (e.g. фрицёнок, шпицята). However, according to Yanushevskaya & Bunčić (2015), /ts/ really is always hard, and realizing it as palatalized [tsʲ] is considered "emphatically non-standard", and occurs only in some regional accents.
  • /tɕ/ and /j/ are always soft.
  • /ɕː/ is also always soft. A formerly common pronunciation of /ɕ/+/tɕ/ indicates the sound may be two underlying phonemes: /ʂ/ and /tɕ/, thus /ɕː/ can be considered as a marginal phoneme. In today's most widespread pronunciation, [ɕtɕ] appears (instead of [ɕː]) for orthographical -зч-/-сч- where ч- starts the root of a word, and -з/-с belongs to a preposition or a "clearly distinguishable" prefix (e.g. без часо́в [bʲɪɕtɕɪˈsof] , 'without a clock'; расчерти́ть [rəɕtɕɪrˈtʲitʲ], 'to rule'); in all other cases /ɕː/ is used (щётка [ˈɕːɵtkə], гру́зчик [ˈɡruɕːɪk], перепи́счик [pʲɪrʲɪˈpʲiɕːɪk], сча́стье [ˈɕːæsʲtʲjə], мужчи́на [mʊˈɕːinə], исщипа́ть [ɪɕːɪˈpatʲ], расщепи́ть [rəɕːɪˈpʲitʲ] etc.)
  • The marginal phoneme /ʑː/ is used only by speakers of the conservative Moscow accent, and is somewhat obsolete. The corresponding modern pronunciation is hard [ʐː]. This sound may derive from an underlying /zʐ/ or /sʐ/: заезжа́ть [zə(ɪ̯)ɪˈʑːætʲ], modern [zə(ɪ̯)ɪˈʐːatʲ]. In modern accent it can only be formed by assimilative voicing of [ɕː] (including across words): вещдо́к [vʲɪʑːˈdok]. For more information, see alveolo-palatal consonant and retroflex consonant.
• /ʂ/ and /ʐ/ are somewhat concave apical postalveolar. They may be described as retroflex, e.g. by (Hamann 2004), but this is to indicate that they are not laminal nor palatalized; not to say that they are subapical.
• Hard /t, d, n/ are laminal denti-alveolar [t̪, d̪, n̪]; unlike in many other languages, /n/ does not become velar [ŋ] before velar consonants.
• Hard /ɫ/ has been variously described as pharyngealized apical alveolar [l̺ˤ] and velarized laminal denti-alveolar [l̪ˠ].
• Hard /r/ is postalveolar, typically a trill [r̠].
• Soft /rʲ/ is an apical dental trill [r̪ʲ], usually with only a single contact.
• Soft /tʲ, dʲ, nʲ/ are laminal alveolar [t̻ʲ^sʲ, d̻ʲ^zʲ, n̻ʲ]. In the case of the first two, the tongue is raised just enough to produce slight frication as indicated in the transcription.
• Soft /lʲ/ is either laminal alveolar [l̻ʲ] or laminal denti-alveolar [l̪ʲ].
• /ts, s, sʲ, z, zʲ/ are dental [t̪s̪, s̪, s̪ʲ, z̪, z̪ʲ], i.e. dentalized laminal alveolar. They are pronounced with the blade of the tongue very close to the upper front teeth, with the tip of the tongue resting behind the lower front teeth.
• The voiced /v, vʲ/ are often realized with weak friction [v̞, v̞ʲ] or even as approximants [ʋ, ʋʲ], particularly in spontaneous speech.
• A marginal phoneme /ɣ/ occurs instead of /ɡ/ in certain interjections: ага́, ого́, угу́, эге, о-го-го́, э-ге-ге, гоп. (Thus, there exists a minimal pair of homographs: ага́ [ʌˈɣa]  'aha!' vs ага́ [ʌˈɡa] 'agha'). The same sound [ɣ] can be found in бухга́лтер (spelled ⟨хг⟩, though in цейхга́уз, ⟨хг⟩ is [x]), optionally in га́битус and in a few other loanwords. Also optionally (and less frequently than a century ago) [ɣ] can be used instead of [ɡ] in certain religious words (a phenomenon influenced by Church Slavonic pronunciation): Бо́га [ˈboɣə], Бо́гу [ˈboɣʊ]... (declension forms of Бог [ˈbox] 'God'), Госпо́дь [ɣʌˈspɵtʲ] 'Lord' (especially in the exclamation Го́споди! [ˈɣospədʲɪ] 'Oh Lord!'), благо́й [bɫʌˈɣɵj] 'good'.
• Some linguists (like I. G. Dobrodomov and his school) postulate the existence of a phonemic glottal stop /ʔ/. This marginal phoneme can be found, for example, in the word не́-а [ˈnʲeʔə] . Claimed minimal pairs for this phoneme include су́женный [ˈsʔuʐɨnɨj] 'narrowed' (a participle from су́зить 'to narrow', with prefix с- and root -уз-, cf. у́зкий 'narrow') vs су́женый [ˈsuʐɨnɨj] 'betrothed' (originally a participle from суди́ть 'to judge', now an adjective; the root is суд 'court') and с А́ней [ˈsʔanʲɪj] 'with Ann' vs Са́ней [ˈsanʲɪj] '(by) Alex'.

There is some dispute over the phonemicity of soft velar consonants. Typically, the soft–hard distinction is allophonic for velar consonants: they become soft before front vowels, as in коро́ткий [kʌˈrotkʲɪj] ('short'), unless there is a word boundary, in which case they are hard (e.g. к Ива́ну [k‿ɨˈvanʊ] 'to Ivan'). Hard variants occur everywhere else. Exceptions are represented mostly by:

• Loanwords:
  • Soft: гёзы, гюрза́, гяу́р, секью́рити, кекс, кяри́з, са́нкхья, хянга́;
  • Hard: кок-сагы́з, гэ́льский, акы́н, кэб (кеб), хэ́ппенинг.
• Proper nouns of foreign origin:
  • Soft: Алигье́ри, Гёте, Гю́нтер, Гянджа́, Джокьяка́рта, Кёнигсберг, Кюраса́о, Кя́хта, Хью́стон, Хёндэ, Хю́бнер, Пюхяя́рви;
  • Hard: Мангышла́к, Гэ́ри, Кызылку́м, Кэмп-Дэ́вид, Архы́з, Хуанхэ́.

The rare native examples are fairly new, as most them were coined in the last century:

• Soft: forms of the verb ткать 'weave' (ткёшь, ткёт etc., and derivatives like соткёшься); догёнок/догята, герцогёнок/герцогята; and adverbial participles of the type берегя, стерегя, стригя, жгя, пекя, секя, ткя (it is disputed whether these are part of the standard language or just informal colloquialisms) ;
• Hard: the name гэ of letter ⟨г⟩, acronyms and derived words (кагебешник, днепрогэсовский), a few interjections (гы, кыш, хэй), some onomatopoeic words (гыгыкать), and colloquial forms of certain patronyms: Олегыч, Маркыч, Аристархыч (where -ыч is a contraction of standard language's patronymical suffix -ович rather than a continuation of ancient -ич).

In the mid-twentieth century, a small number of reductionist approaches made by structuralists put forth that palatalized consonants occur as the result of a phonological processes involving /j/ (or palatalization as a phoneme in itself), so that there were no underlying palatalized consonants. Despite such proposals, linguists have long agreed that the underlying structure of Russian is closer to that of its acoustic properties, namely that soft consonants are separate phonemes in their own right.

Phonological processes

Final devoicing

Voiced consonants (/b/, /bʲ/, /d/, /dʲ/ /ɡ/, /v/, /vʲ/, /z/, /zʲ/, /ʐ/, and /ʑː/) are devoiced word-finally unless the next word begins with a voiced obstruent. г also represents voiceless [x] word-finally in some words, such as бог [ˈbox]. This is related to the use of the marginal (or dialectal) phoneme /ɣ/ in some religious words .

Voicing

Russian features general regressive assimilation of voicing and palatalization. In longer clusters, this means that multiple consonants may be soft despite their underlyingly (and orthographically) being hard. The process of voicing assimilation applies across word-boundaries when there is no pause between words. Within a morpheme, voicing is not distinctive before obstruents (except for /v/, and /vʲ/ when followed by a vowel or sonorant). The voicing or devoicing is determined by that of the final obstruent in the sequence: просьба [ˈprɵzʲbə]  ('request'), водка [ˈvotkə] ('vodka'). In foreign borrowings, this isn't always the case for /f(ʲ)/, as in Адольф Гитлер [ʌˈdɵlʲf ˈɡʲitlʲɪr] ('Adolf Hitler') and граф болеет ('the count is ill'). /v/ and /vʲ/ are unusual in that they seem transparent to voicing assimilation; in the syllable onset, both voiced and voiceless consonants may appear before /v(ʲ)/:

• тварь [tvarʲ]) ('the creature')
• два [dva] ('two')
• световой [s(ʲ)vʲɪtʌˈvɵj] ('of light')
• звезда [z(ʲ)vʲɪˈzda] ('star')

When /v(ʲ)/ precedes and follows obstruents, the voicing of the cluster is governed by that of the final segment (per the rule above) so that voiceless obstruents that precede /v(ʲ)/ are voiced if /v(ʲ)/ is followed by a voiced obstruent (e.g. к вдове [ɡvdʌˈvʲe] 'to the widow') while a voiceless obstruent will devoice all segments (e.g. без впуска [bʲɪs ˈfpuskə] 'without an admission').

/tɕ/, /ts/, and /x/ have voiced allophones ([dʑ], [dz] and [ɣ]) before voiced obstruents, as in дочь бы [ˈdɵdʑ bɨ] ('a daughter would') and плацдарм [pɫʌdzˈdarm] ('bridge-head').

Other than /mʲ/ and /nʲ/, nasals and liquids devoice between voiceless consonants or a voiceless consonant and a pause: контрфорс [ˌkontr̥ˈfors]) ('buttress').

Palatalization

Before /j/, paired consonants (that is, those that come in a hard-soft pair) are normally soft as in пью [pʲjʉ] 'I drink' and бью [bʲjʉ] 'I hit'. However, the last consonant of prefixes and parts of compound words generally remains hard in the standard language: отъезд [ʌˈtjest] 'departure', Минюст [ˌmʲiˈnjʉst] 'Min[istry of] Just[ice]'; when the prefix ends in /s/ or /z/ there may be an optional softening: съездить [ˈs(ʲ)jezʲdʲɪtʲ] ('to travel').

Paired consonants preceding /e/ are also soft; although there are exceptions from loanwords, alternations across morpheme boundaries are the norm. The following examples show some of the morphological alternations between a hard consonant and its soft counterpart:

hard	soft

Velar consonants are soft when preceding /i/, and never occur before [ɨ] within a word.

Before hard dental consonants, /r/, labial and dental consonants are hard: орла [ʌrˈɫa] ('eagle' gen. sg).

Assimilative palatalization

Paired consonants preceding another consonant often inherit softness from it. This phenomenon in literary language has complicated and evolving rules with many exceptions, depending on what these consonants are, in what morphemic position they meet and to what style of speech the word belongs. In old Moscow pronunciation, softening was more widespread and regular; nowadays some cases that were once normative have become low colloquial or archaic. In fact, consonants can be softened to very different extent, become semi-hard or semi-soft.

The more similar the consonants are, the more they tend to soften each other. Also, some consonants tend to be softened less, such as labials and /r/.

Softening is stronger inside the word root and between root and suffix; it is weaker between prefix and root and weak or absent between a preposition and the word following.

• Before soft dental consonants, /lʲ/ and often soft labial consonants, dental consonants (other than /ts/) are soft.
• /x/ is assimilated to the palatalization of the following velar consonant: лёгких ) ('lungs' gen. pl.).
• Palatalization assimilation of labial consonants before labial consonants is in free variation with nonassimilation, such that бомбить ('to bomb') is either [bʌmˈbʲitʲ] or [bʌmʲˈbʲitʲ] depending on the individual speaker.
• When hard /n/ precedes its soft equivalent, it is also soft and likely to form a single long sound (see gemination). This is slightly less common across affix boundaries.

In addition to this, dental fricatives conform to the place of articulation (not just the palatalization) of following postalveolars: с частью ) ('with a part'). In careful speech, this does not occur across word boundaries.

Russian has the rare feature of nasals not typically being assimilated in place of articulation. Both /n/ and /nʲ/ appear before retroflex consonants: деньжонки ) ('money' (scornful)) and ханжой ) ('sanctimonious one' instr.). In the same context, other coronal consonants are always hard.

Consonant clusters

As a Slavic language, Russian has fewer phonotactic restrictions on consonants than many other languages, allowing for clusters that would be difficult for English speakers; this is especially so at the beginning of a syllable, where Russian speakers make no sonority distinctions between fricatives and stops. These reduced restrictions begin at the morphological level; outside of two morphemes that contain clusters of four consonants: встрет-/встреч- 'meet' ([ˈfstrʲetʲ/ˈfstrʲetɕ]), and чёрств-/черств- 'stale' ([ˈtɕɵrstv]), native Russian morphemes have a maximum consonant cluster size of three:

3-Segment clusters

	Russian	IPA/Audio	Translation
CCL	скрыва́ть		'to hide'
CCC*	ствол		'tree trunk'
LCL	верблю́д		'camel'
LCC	то́лстый		'thick'

For speakers who pronounce [ɕtɕ] instead of [ɕː], words like общий ('common') also constitute clusters of this type.

2-Segment clusters

	Russian	IPA/Audio	Translation
CC	кость		'bone'
LC	смерть		'death'
CL	слепо́й		'blind'
LL	го́рло		'throat'
CJ	статья́		'article'
LJ	рья́ный		'zealous'

If /j/ is considered a consonant in the coda position, then words like айва́ ('quince') contain semivowel+consonant clusters.

Affixation also creates consonant clusters. Some prefixes, the best known being вз-/вс- ([vz-]/[fs-]), produce long word-initial clusters when they attach to a morpheme beginning with consonant(s) (e.g. |fs|+ |pɨʂkə| → вспы́шка [ˈfspɨʂkə] 'flash'). However, the four-consonant limitation persists in the syllable onset.

Clusters of three or more consonants are frequently simplified, usually through syncope of one of them, especially in casual pronunciation. Various cases of relaxed pronunciation in Russian can be seen here.

All word-initial four-consonant clusters begin with [vz] or [fs], followed by a stop (or, in the case of [x], a fricative), and a liquid:

4-Segment clusters

Russian	IPA/Audio	Translation
(ему) взбрело (в голову)	[vzbrʲɪˈɫo]	'(he) took it (into his head)'
взгляд		'gaze'
взгромоздиться		'to perch'
вздрогнуть		'to flinch'
всклокоченный		'disheveled'
вскрыть		'to unseal'
всплеск		'splash'
вспрыгнуть		'to jump up'
встлеть	[ˈfstlʲetʲ]	'to begin to smolder'
встречать		'to meet'
всхлип	[ˈfsxlʲip]	'whimper'
всхрапывать		'to snort'

Because prepositions in Russian act like clitics, the syntactic phrase composed of a preposition (most notably, the three that consist of just a single consonant: к, с, and в) and a following word constitutes a phonological word that acts like a single grammatical word. For example, the phrase с друзья́ми ('with friends') is pronounced [zdrʊˈzʲjæmʲɪ]. In the syllable coda, suffixes that contain no vowels may increase the final consonant cluster of a syllable (e.g. Ноя́брьск 'city of Noyabrsk' |noˈjabrʲ|+ |sk| → [nʌˈjæbrʲsk]), theoretically up to seven consonants: *мо́нстрств [ˈmonstrstf] ('of monsterships'). There is usually an audible release between these consecutive consonants at word boundaries, the major exception being clusters of homorganic consonants.

Consonant cluster simplification in Russian includes degemination, syncope, dissimilation, and weak vowel insertion. For example, /sɕː/ is pronounced [ɕː], as in расще́лина ('cleft'). There are also a few isolated patterns of apparent cluster reduction (as evidenced by the mismatch between pronunciation and orthography) arguably the result of historical simplifications. For example, dental stops are dropped between a dental continuant and a dental nasal or lateral: ле́стный [ˈlʲesnɨj] 'flattering'. Other examples include:

/vstv/ > [stv]	чу́вство	'feeling'
/ɫnts/ > [nts]	со́лнце	'sun'
/rdts/ > [rts]	се́рдце	'heart'
/rdtɕ/ > [rtɕ]	сердчи́шко	'heart' (diminutive)	[sʲɪrˈtɕiʂkə] (not [sʲɪrttɕiʂkə])
/ndsk/ > [nsk]	шотла́ндский	'Scottish'
/stsk/ > [sk]	маркси́стский	'Marxist'	[mʌrkˈsʲiskʲɪj] (not [mʌrkˈsʲistskʲɪj])

The simplifications of consonant clusters are done selectively; bookish-style words and proper nouns are typically pronounced with all consonants even if they fit the pattern. For example, the word голла́ндка is pronounced in a simplified manner [ɡʌˈɫankə] for the meaning of 'Dutch oven' (a popular type of oven in Russia) and in a full form [ɡʌˈɫantkə] for 'Dutch woman' (a more exotic meaning).

In certain cases, this syncope produces homophones, e.g. ко́стный ('bony') and ко́сный ('rigid'), both are pronounced .

Another method of dealing with consonant clusters is inserting an epenthetic vowel (both in spelling and in pronunciation), ⟨о⟩, after most prepositions and prefixes that normally end in a consonant. This includes both historically motivated usage and cases of its modern extrapolations. There are no strict limits when the epenthetic ⟨о⟩ is obligatory, optional, or prohibited. One of the most typical cases of the epenthetic ⟨о⟩ is between a morpheme-final consonant and a cluster starting with the same or similar consonant (e.g. со среды́ 'from Wednesday' |s|+ |srʲɪˈdɨ| → [səsrʲɪˈdɨ], not *с среды; ототру́ 'I'll scrub' |ot|+ |ˈtru| → [ʌtʌˈtru], not *оттру).

Supplementary notes

There are numerous ways in which Russian spelling does not match pronunciation. The historical transformation of /ɡ/ into /v/ in genitive case endings and the word for 'him' is not reflected in the modern Russian orthography: the pronoun его [jɪˈvo] 'his/him', and the adjectival declension suffixes -ого and -его. Orthographic г represents /x/ in a handful of word roots: легк-/лёгк-/легч- 'easy' and мягк-/мягч- 'soft'. There are a handful of words in which consonants which have long since ceased to be pronounced even in careful pronunciation are still spelled, e.g., the 'l' in солнце [ˈsontsɨ] ('sun').

/n/ and /nʲ/ are the only consonants that can be geminated within morpheme boundaries. Such gemination does not occur in loanwords.

Between any vowel and /i/ (excluding instances across affix boundaries but including unstressed vowels that have merged with /i/), /j/ may be dropped: аист [ˈa.ɪst] ('stork') and делает [ˈdʲeɫəɪt] ('does'). (Halle (1959) cites заезжать and other instances of intervening prefix and preposition boundaries as exceptions to this tendency.)

Stress in Russian may fall on any syllable and words can contrast based just on stress (e.g. мука [ˈmukə] 'ordeal, pain, anguish' vs. [mʊˈka] 'flour, meal, farina'); stress shifts can even occur within an inflexional paradigm: до́ма [ˈdomə] ('house' gen. sg.) vs дома́ [dʌˈma] ('houses'). The place of the stress in a word is determined by the interplay between the morphemes it contains, as some morphemes have underlying stress, while others do not. However, other than some compound words, such as морозоустойчивый [mʌˌrozəʊˈstɵjtɕɪvɨj] ('frost-resistant') only one syllable is stressed in a word.

/i/ velarizes hard consonants: ты ('you' sing.). /o/ and /u/ velarize and labialize hard consonants and labialize soft consonants: бок ('side'), нёс ('(he) carried').

Between a hard consonant and /o/, a slight [w] offglide occurs, most noticeably after labial, labio-dental and velar consonants (e.g. мок, 'was soaking' [mˠwok]). Similarly, a weak palatal offglide may occur between certain soft consonants and back vowels (e.g. ляжка 'thigh' [ˈlʲjæʂkə]).

See also

• Help:IPA/Russian
• Russian alphabet
• Russian orthography
  • Reforms of Russian orthography
• History of the Russian language
• List of Russian language topics
• Index of phonetics articles

Bibliography

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Further reading

• Hamilton, William S. (1980), Introduction to Russian Phonology and Word Structure, Slavica Publishers 
• Gasanov, A.A.; Babayev, I.A. (2010), Курс лекций по фонетике современного русского языка, archived from the original on 2011-11-11, https://web.archive.org/web/20111111191420/http://bsu-edu.org/ders_vesaitleri/16.pdf 
• Hamann, Silke (2002), "Postalveolar Fricatives in Slavic Languages as Retroflexes", in Baauw, S.; Huiskes, M.; Schoorlemmer, M., OTS Yearbook 2002, Utrecht: Utrecht Institute of Linguistics, pp. 105–127, http://www.let.uu.nl/~Silke.Hamann/personal/Hamann2002SlavicRet.pdf, retrieved 2008-02-07 
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