The genitive plural is the single hardest cell in the feminine declension, and it earns that reputation honestly: it is the place where the four feminine types diverge the most, where Czech inserts a vowel out of nowhere (matka → matek), and where it shortens vowels you did not expect (kráva → krav). It is also a cell you cannot avoid — it shows up after every number from five up, and after every quantity word (hodně, málo, spousta, pár, moc, kolik). "Five women," "a lot of streets," "loads of bones" all need it. This page lays out which type takes which ending and how the fill vowel works.
The four types take two endings: zero or -í
Across the four feminine paradigms, the genitive plural lands on one of just two endings — a zero ending (the bare stem) or -í:
| Type | Nom. sg | Gen. pl | Ending |
|---|---|---|---|
| žena (hard) | žena | žen | zero |
| růže (soft -e) | růže | růží | -í |
| píseň (soft consonant) | píseň | písní | -í |
| kost (i-stem) | kost | kostí | -í |
The clean takeaway: only the hard žena type uses the zero ending as its default; the three other types take -í. So žen, knih, škol (zero) versus růží, písní, kostí (-í). The wrinkle — and there is always a wrinkle — is that a sizeable group of soft -e nouns, especially those in -ice, defects to the zero ending too. We come to that below.
Na náměstí se sešlo hodně žen i mužů.
A lot of women and men gathered in the square. (žena → žen, zero ending)
Mám doma spoustu knih, ale nestíhám je číst.
I have loads of books at home, but I can't keep up with reading them. (kniha → knih, zero)
Zná stovky lidových písní.
She knows hundreds of folk songs. (píseň → písní, -í)
Polévka se vaří z kostí.
The soup is made from bones. (kost → kostí, -í)
The zero ending and the fill vowel
When the žena (or zero-ending soft) type strips its vowel and leaves a bare stem, that stem sometimes ends in a consonant cluster a Czech word cannot end on. Czech repairs this by inserting a fill vowel -e- to break the cluster. This is the feature with no English parallel and the one learners most often get wrong by simply leaving it out.
The rule is mechanical: if the bare stem would end in two consonants, slot -e- between them.
| Nom. sg | Bare stem | Gen. pl (with fill vowel) |
|---|---|---|
| matka (mother) | *matk- | matek |
| sestra (sister) | *sestr- | sester |
| dívka (girl) | *dívk- | dívek |
| hra (game, play) | *hr- | her |
| karta (card) | *kart- | karet |
| kočka (cat) | *kočk- | koček |
By contrast, when the bare stem already ends in a single consonant — žen-, škol-, vod-, knih- — no repair is needed and nothing is inserted: žen, škol, vod, knih.
Na oslavě bylo pět matek s dětmi.
There were five mothers with their children at the party. (matka → matek)
Mám tři sestry, ale dnes přišlo jen pár sester.
I have three sisters, but only a couple of sisters came today. (sestra → sester)
Koupili jsme dětem balíček hracích karet.
We bought the kids a pack of playing cards. (karta → karet)
Hráli jsme spoustu deskových her.
We played loads of board games. (hra → her)
Vowel length changes in the zero ending
A second surprise hides in the zero ending: stripping the ending sometimes lengthens the stem vowel, and sometimes the headword's long vowel shortens. The lengthening is the more common and the more startling:
| Nom. sg | Gen. pl | Change |
|---|---|---|
| kráva (cow) | krav | á → a (shortens) |
| žába (frog) | žab | á → a (shortens) |
| noha (leg, foot) | noh | stable |
| hora (mountain) | hor | stable (but cf. dat/loc hoře) |
| síla (strength) | sil | í → i (shortens) |
So kráva with a long á gives the genitive plural krav with a short a. This shortening is regular for a set of nouns whose stem vowel is long in the nominative; the long vowel was "borrowed" from the ending that is now gone, so when the ending vanishes the vowel reverts to short. Do not over-generalise it — many nouns keep their vowel (škola → škol, kniha → knih) — but be ready for it on the high-frequency kráva → krav, síla → sil.
Na pastvině se páslo pět krav.
Five cows were grazing in the pasture. (kráva → krav, á → a)
Nemám už dost sil to dotáhnout do konce.
I no longer have enough strength to see it through. (síla → sil, í → i)
The soft -e split: růží versus ulic
Now to the wrinkle promised earlier. The soft růže type does not take a single uniform genitive plural. The model word and many others take -í, but a large native group — above all nouns ending in -ice — defects to the zero ending, declining like žena here:
| Takes -í | Takes zero |
|---|---|
| růže → růží (roses) | ulice → ulic (streets) |
| restaurace → restaurací (restaurants) | košile → košil (shirts) |
| konference → konferencí (conferences) | neděle → neděl (Sundays/weeks) |
| kolekce → kolekcí (collections) | stanice → stanic (stations) |
The rough guide that actually helps: the productive loanwords in -ace/-ence/-cie take -í (restaurací, konferencí, kolekcí), while everyday native words — especially -ice nouns and the short list ulice, košile, neděle, chvíle — take the zero ending (ulic, košil, neděl, chvil). There is no rule that settles every word, so learn the high-frequency zero-ending members and default an unfamiliar soft -e noun to -í.
Kytice byla plná bílých růží.
The bouquet was full of white roses. (růže → růží, -í)
V centru je spousta dobrých restaurací.
There are loads of good restaurants in the centre. (restaurace → restaurací, -í)
Bydlí o pár ulic dál.
They live a few streets further along. (ulice → ulic, zero ending)
Koupila si pět nových košil.
She bought five new shirts. (košile → košil, zero ending)
Common mistakes
❌ Mám spoustu matk doma.
Incorrect — the bare stem matk- is unpronounceable; it needs the fill vowel -e-: matek.
✅ Mám spoustu matek.
I have loads of mums around. (matka → matek)
❌ Bylo tam pět žens.
Incorrect — Czech never adds an English-style -s. The genitive plural of žena is the bare stem žen.
✅ Bylo tam pět žen.
There were five women there. (žena → žen)
❌ Bylo tam pět restaurac.
Incorrect — restaurace takes -í in the genitive plural, not the zero ending: pět restaurací.
✅ Bylo tam pět restaurací.
There were five restaurants there. (restaurace → restaurací)
❌ Na pastvině se páslo pět krávů.
Incorrect — žena-type nouns take the zero ending, not -ů; and the vowel shortens: krav.
✅ Na pastvině se páslo pět krav.
Five cows were grazing in the pasture. (kráva → krav)
❌ Zná stovky lidových písen.
Incorrect — píseň takes -í in the genitive plural (písní), not a zero ending; the žena pattern doesn't apply to a soft-consonant noun.
✅ Zná stovky lidových písní.
She knows hundreds of folk songs. (píseň → písní)
Three distinct English-speaker errors recur here, and they pull in opposite directions: leaving out the fill vowel (*matk), adding an English plural -s (\žens), and over-applying the žena zero ending to types that actually take -í (*písen, *krávů). The cure is to fix the ending per type first — žena/zero-soft take zero, the other three take -í* — and only then worry about fill vowels and vowel length, which affect only the zero-ending words.
Key takeaways
- The feminine genitive plural takes one of two endings: a zero ending (žena and a group of soft -e nouns) or -í (růže-type loanwords, píseň, kost).
- The zero ending forces a fill vowel -e- when the bare stem would end in a cluster: matka → matek, sestra → sester, hra → her, karta → karet.
- Some zero-ending nouns also change vowel length: kráva → krav, síla → sil.
- The soft -e type splits: -í for růží, restaurací, kolekcí; zero for ulic, košil, neděl, chvil. Default the unknown to -í. See the růže paradigm.
- The consonant-final types are regular: písní and kostí, plain -í, no fill vowel.
- Never add an English -s, and never leave a final consonant cluster unbroken.
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Start learning Czech→Related Topics
- Feminine: The Žena ParadigmA1 — The hard feminine pattern žena (woman) — the model for the huge class of feminine nouns ending in -a, with its full seven-case table for both numbers.
- Feminine: The Růže ParadigmA2 — The soft feminine pattern růže (rose) — the model for feminine nouns ending in -e/-ě, with its full seven-case table and the soft/hard contrast against žena.
- Feminine Paradigms ComparedB1 — A side-by-side of žena, růže, píseň, and kost to fix the feminine declension system.
- The Genitive Plural and Its Zero EndingB1 — Forming the often endingless genitive plural (žen, měst, aut), the masculine -ů and soft -í, and the inserted vowel that breaks up consonant clusters (matka → matek).
- The Genitive After Quantity WordsA2 — How indefinite quantity words like mnoho, málo and trochu force the counted noun into the genitive.