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Dopełniacz: the Polish genitive case
The genitive turns up more often than any other Polish case, which is exactly why it feels overwhelming: it is not one rule but a dozen jobs sharing one set of endings. The way through is not to learn it all at once — it is to learn the jobs one at a time, starting with the one you need on day one.
Start here: nie ma and nie mam
Of everything the genitive does, this is the piece worth having first, because you will need it in your first week in a shop or an office. Polish says that something is absent by putting it in the genitive after nie ma — and the same happens to the object of any negated verb.
Nie ma chleba.
There is no bread.
Nie mam czasu.
I have no time.
Nie lubię kawy.
I don't like coffee.
The endings
Feminine nouns are the easy half: -a becomes -y, or -i after a soft consonant and after k or g. Masculine and neuter are the harder half, and masculine has a genuine split that has to be learned word by word — some nouns take -a, others -u, and no rule predicts it reliably.
Do not try to memorise which masculine nouns take which. Living things and most concrete objects lean towards -a; abstractions, materials and mass nouns lean towards -u. Learn the tendency, then learn the exceptions by meeting them.
| Gender | Ending | Example |
|---|---|---|
| feminine | -y / -i | kawa → kawy · herbata → herbaty |
| masculine | -a / -u | chleb → chleba · czas → czasu |
| neuter | -a | okno → okna · mleko → mleka |
The other jobs it does
Once negation is automatic, the rest arrive gradually and none of them is a surprise to a Slavic speaker: possession, quantities, most prepositions of origin and absence, and dates. If your language would use its own genitive here, Polish almost certainly does too.
To jest dom mojej siostry.
This is my sister's house. — possession
Poproszę kilo jabłek.
A kilo of apples, please. — quantity
Jestem z Ukrainy.
I am from Ukraine. — after z
Szukam pracy.
I am looking for work. — szukać always takes it
Five and up: the counting rule
Polish counts the way Ukrainian and Russian do, and for the same reason. Two, three and four take the plain plural; five and above take the genitive plural. What decides is the last digit, so twenty-two goes back to the plural form and twenty-five returns to the genitive.
dwa złote · pięć złotych
two zloty · five zloty
trzy godziny · siedem godzin
three hours · seven hours
Mistakes people make
Nie ma chleb. → Nie ma chleba.
nie ma is always followed by the genitive. The dictionary form here says the bread is present, which is the opposite of the sentence.
Nie mam czasa. → Nie mam czasu.
czas is one of the masculine nouns that take -u. Abstractions usually do; there is no way around learning which.
pięć złote → pięć złotych
From five upwards the counted noun goes into the genitive plural, exactly as in your own language.
Check yourself
Complete: Nie ma ___ (mleko).
Neuter takes -a.
Complete: Nie lubię ___ (herbata).
Feminine -a becomes -y.
Say: five zloty.
Turn this into something you can actually say.
Practise this in FreeTalk →Free to start. No card needed.
Questions people ask
Why is the genitive called the hardest Polish case?
Not because the endings are hard, but because it has more jobs than any other case and one of its endings is unpredictable. Nobody learns it as a unit. You learn negation, then quantities, then prepositions, and one day you notice you stopped thinking about it.
How do I know whether a masculine noun takes -a or -u?
There is no reliable rule, and Poles do not have one either — they simply know. The tendency helps: things you can point at lean to -a (chleb, stół, ser), things you cannot lean to -u (czas, cukier, sklep). Learn the form with the word, the way you learn its gender.