You have met the individual rules — final devoicing, voicing assimilation in clusters, and consonant clusters. This page pulls them into a single reference so you can pronounce any Russian consonant cluster on sight. The throughline that connects all of them is one idea: Russian spelling stays fixed, but consonants are pronounced according to their phonetic neighbourhood. Stop reading letter by letter and start reading by sound environment — decide the voicing of a whole cluster from its last consonant, devoice obstruents at the word's edge, and let a few well-known letter combinations go silent. Master this page and the gap between how Russian is written and how it is said closes almost completely.
The master rule: the last obstruent decides the cluster
An obstruent is a consonant made by obstructing airflow — the stops /p b t d k g/ and the fricatives /f v s z ʃ ʒ x/. They come in voiced/voiceless pairs, and when several sit in a row, they must agree on voicing. The agreement is regressive: the cluster takes the voicing of its rightmost obstruent, and the influence flows backwards onto everything in front of it. The spelling never changes; only the sound does.
| Voiced | б | в | г | д | ж | з |
|---|---|---|---|---|---|---|
| Voiceless | п | ф | к | т | ш | с |
Everything below is this one rule applied in different places. Read clusters right to left: find the last obstruent, decide voiced or voiceless from it, and apply that to the whole run.
Rule 1: regressive voicing assimilation in clusters
Inside a word, a cluster of obstruents snaps to the voicing of the last one — in both directions.
Voiced → voiceless before a voiceless consonant:
во́дка
vodka — /ˈvotkə/, 'VOT-ka.' Voiced д devoices to 't' before the voiceless к.
ло́жка
spoon — /ˈloʂkə/, 'LOSH-ka.' Voiced ж devoices to 'sh' before к; written жк, heard 'shk.'
Voiceless → voiced before a voiced consonant:
сде́лать
to do / to make — /ˈzdʲeɫətʲ/, 'ZDYE-lat.' Voiceless с voices to 'z' before the voiced д.
про́сьба
request — /ˈprozʲbə/, 'PROZ-ba.' The с (softened by ь) voices to 'z' before the voiced б.
вокза́л
train station — /vɐɡˈzaɫ/, 'vag-ZAL.' Voiceless к voices to 'g' before the voiced з.
(Reminder of the two refinements from the detailed page: в can itself be devoiced/voiced but never triggers voicing of the consonant before it — твой stays "tvoy"; and the sonorants л м н р й are transparent, neither assimilating nor triggering it.)
Rule 2: final devoicing — the same rule at the word edge
A voiced obstruent at the end of a word has nothing voiced after it to keep it voiced, so it falls to its voiceless partner. This is just the master rule with silence on the right.
хлеб
bread — /xlʲep/, 'khlyep.' Final б devoices to 'p.'
друг
friend — /druk/, 'druk.' Final г devoices to 'k.'
го́род
city — /ˈɡorət/, 'GO-rat.' Final д devoices to 't.'
нож
knife — /noʂ/, 'nosh.' Final ж devoices to 'sh.'
Rule 3: assimilation crosses the preposition (and prefix) boundary
Russian prepositions and prefixes are clitics — they fuse phonologically onto the next word and form one unit with it. So the master rule reaches across the space between a preposition and its noun. The most vivid result: the preposition в ("in") is pronounced "f" or "v" purely according to the next word's first sound, though always spelled в.
в шко́ле
at school — /f‿ˈʂkolʲe/, 'f-SHKO-lye.' в devoices to 'f' before the voiceless cluster шк.
в Петербу́рге
in St Petersburg — /f‿pʲɪtʲɪrˈburɡʲe/, 'f-pye-tyer-BUR-gye.' в is 'f' before the voiceless п.
в Москве́
in Moscow — /v‿mɐskˈvʲe/, 'v-mask-VYE.' в stays 'v' before the sonorant м.
с друзья́ми
with friends — /z‿druˈzʲjamʲi/, 'z-druz-YA-mi.' The preposition с voices to 'z' before the voiced д.
отбе́жать
to run off — /ɐdˈbʲeʐətʲ/, 'ad-BYE-zhat.' The prefix от- voices its т to 'd' before the voiced б of the root.
So the single letter в is three different sounds — "f" in в шко́ле, "f" in в Петербу́рге, "v" in в Москве́ — depending entirely on what follows. Pronounce the preposition glued to its noun, as if the whole phrase were one word.
Rule 4: silent letters — cluster simplification
Russian also drops a consonant in certain three-consonant clusters that are awkward to articulate. The letter stays in the spelling; the sound disappears. These are worth memorizing as a short, closed list.
| Written | Said | Example | Meaning |
|---|---|---|---|
| стн | сн ('sn') | изве́стный → 'изве́сный' | famous |
| здн | зн ('zn') | по́здно → 'по́зно' | late |
| стл | сл ('sl') | счастли́вый → 'щасли́вый' | happy |
| лнц | нц ('nts') | со́лнце → 'со́нце' | sun |
| рдц | рц ('rts') | се́рдце → 'се́рце' | heart |
| вств | ств ('stv') | здра́вствуйте → 'здра́ствуйте' | hello |
со́лнце
sun — /ˈsontsə/, 'SON-tse.' The л is silent: the cluster лнц simplifies to 'nts.'
по́здно
late — /ˈpoznə/, 'POZ-na.' The д is silent: здн → 'zn.'
здра́вствуйте
hello (formal/polite) — /ˈzdrastvujtʲe/, 'ZDRAST-vuy-tye.' The first в is silent: вств → 'stv.' One of the first words you learn, and it has a silent letter.
чу́вствовать
to feel — /ˈtɕustvəvətʲ/, 'CHU-stva-vat.' The в in чувств is silent, same as in здра́вствуйте.
Rule 5: the lexical что → 'shto'
A handful of very common words are pronounced irregularly, against the spelling, and you simply memorize them. The headline one is что ("what / that"), where чт is said "sht", not "cht."
что
what / that — /ʂto/, 'shto,' NOT 'chto.' One of the most frequent words in the language, and one of the most important irregular pronunciations to learn early.
что́бы
in order to / so that — /ˈʂtobɨ/, 'SHTO-by.' Same чт → 'sht.'
коне́чно
of course — /kɐˈnʲeʂnə/, 'ka-NYESH-na.' Here чн is said 'shn,' not 'chn' — another lexical irregular (also in ску́чно 'boring').
These are not productive rules; they belong to specific words. Note the contrast: in most words чн is said "chn" (то́чно "tochno," "exactly"), so коне́чно and ску́чно are exceptions you flag individually.
How it all fits together: one decision procedure
Faced with any cluster, run this in order:
- Is it one of the silent-letter combos (стн, здн, стл, лнц, рдц, вств)? Drop the silent consonant.
- Is it a known lexical irregular (что, коне́чно, ску́чно)? Use the memorized pronunciation.
- Otherwise, apply voicing assimilation: find the rightmost obstruent (or the word edge / a following preposition's first sound), read its voicing, and assign that voicing to the whole cluster.
That covers essentially every cluster you will meet. The payoff is exactly the promise of this page: you pronounce by the sound environment, not letter by letter, and the fixed spelling stops misleading you.
Comparison with English
English assimilates voicing too, but mostly progressively (left to right) and at suffix boundaries — cats /kæts/ vs dogs /dɒgz/, where the ending agrees with the sound before it. Russian runs the influence backwards, deciding from the consonant on the right, and it reaches across the clitic boundary between a preposition and its noun — something English doesn't do (English "in" never becomes "if" before a voiceless word). English does have silent letters in clusters (castle, Wednesday), which is a familiar foothold for Rule 4. The conceptual adjustment is mostly about direction: point your existing voicing-assimilation ability backwards, and let it cross word boundaries.
Common Mistakes
❌ во́дка said 'VOD-ka' with a voiced 'd'
Incorrect — д devoices before voiceless к: 'VOT-ka.' The last obstruent (к) decides the cluster.
✅ во́дка = 'VOT-ka'
vodka — voiceless cluster дк.
❌ хлеб said with a final 'b'
Incorrect — final voiced obstruents devoice: 'khlyep,' not 'khlyeb.'
✅ хлеб = 'khlyep'
bread — final devoicing.
❌ что pronounced 'chto'
Incorrect — что is a lexical irregular: чт → 'sht.' Say 'shto.'
✅ что = 'shto'
what — memorize this irregular pronunciation.
❌ со́лнце said with the 'l' pronounced ('SOLN-tse')
Incorrect — лнц simplifies; the л is silent: 'SON-tse.'
✅ со́лнце = 'SON-tse'
sun — silent л.
❌ в шко́ле said with a clear 'v'
Incorrect — the preposition в devoices to 'f' before the voiceless cluster шк: 'f-SHKO-lye.' Assimilation crosses the boundary.
✅ в шко́ле = 'f-SHKO-lye'
at school — в is 'f' here.
Key Takeaways
- All the rules reduce to one: in a cluster of obstruents, the rightmost obstruent decides the voicing of the whole cluster (regressive assimilation).
- Final devoicing (хлеб→'khlyep', друг→'druk') is that rule with silence on the right.
- Assimilation crosses preposition/prefix boundaries — в is "f" in в шко́ле / в Петербу́рге but "v" in в Москве́.
- A short closed list of clusters has silent letters: стн→'sn', здн→'zn', стл→'sl', лнц→'nts', рдц→'rts', вств→'stv' (со́лнце, по́здно, здра́вствуйте).
- A few lexical irregulars override spelling: что→'shto', коне́чно/ску́чно→'-shn-'.
- The practical payoff: pronounce by the sound environment, not letter by letter — see voicing-assimilation and final-devoicing for the deep dives.
Now practice Russian
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Start learning Russian→Related Topics
- Voicing Assimilation in ClustersB1 — In a Russian consonant cluster, the voicing of the whole cluster is decided by its last obstruent — so в can be 'v' or 'f' depending on what follows, and the rule works both inside words and across the boundary between a preposition or prefix and the next word.
- Final Consonant DevoicingA2 — Russian devoices its voiced obstruents at the end of a word — б→п, в→ф, г→к, д→т, ж→ш, з→с — so го́род ends in 't' and друг ends in 'k', though the spelling never changes and the voicing returns the moment a vowel ending follows.
- Consonant Clusters and SimplificationB1 — Russian piles consonants together far more than English — взгляд, встре́ча, здра́вствуйте — but it also drops letters out of certain clusters in predictable ways: стн loses т, здн loses д, лнц loses л, рдц loses д, and learning the cluster rules beats memorising each word.
- Hard and Soft Consonants (Palatalization)A2 — Almost every Russian consonant comes in a hard and a soft (palatalized) version, the soft one made by raising the tongue toward the palate to add a faint /j/ colour as part of a single sound — and minimal pairs like брат/брать, мат/мать, нос/нёс show this contrast carries meaning.
- Russian Pronunciation: OverviewA1 — A map of Russian phonology built on four pillars — unpredictable mobile stress, heavy vowel reduction, hard/soft consonant pairs, and final devoicing/assimilation — and the headline news that Russian spelling is largely phonemic once you know where the stress falls.
- Letters and Their SoundsA1 — A systematic letter-to-sound table for the full, stressed value of every Russian letter — the ten vowels as five hard/soft pairs, the mostly one-to-one consonants, the famous г = /v/ surprise in -ого/-его, and the sounds Russian simply does not have.