The Four Declensions

You already know Ukrainian has seven cases. The obvious next question is: where do all those endings come from? The answer is that nouns don't each have their own private set of endings — they fall into four declension classes (відмі́ни), and every noun in a class takes the same endings. Learn the four classes and the one stem-group split that runs inside two of them, and the whole case system collapses from "hundreds of forms" into "four patterns with a couple of sub-rules." This page is the organising chart; the individual case pages fill in each cell.

What a declension is

A declension is a group of nouns that decline — change through the cases — the same way. Membership is decided by two things working together: the noun's gender and the ending of its nominative singular (the dictionary form). So before you can place a noun in its declension, you need its gender (covered on the gender overview page) and you need to look at how it ends.

The four declensions in one table

One clarification the table can't hold cleanly: male-denoting nouns split by their ending, not by their meaning. Those that end in -о — та́то "dad," ба́тько "father," дя́дько "uncle," and male first names like Петро́, Дани́ло, Дми́тро — are Declension II (the same class as стіл, вікно́), because Declension II is exactly "masculine consonant/-й/-о plus neuter -о/-е." Only the male nouns that end in -а/-я — Мики́та, Мико́ла, суддя́ "judge," старшина́ "sergeant" — go into Declension I, alongside the feminines. So the question is never "is it a man?" but "what does it end in?": -о → II, -а/-я → I. What matters at A2 is recognising the four big families below.

Declension I — the -а / -я class (the largest)

This is the home of most feminine nouns and a set of male-denoting and profession nouns that happen to end in -а/-я. It is the biggest class you'll meet.

Declension II — masculines and neuters (the workhorse)

Declension II is the engine room: nearly all masculine nouns ending in a consonant or -й or -о, plus all neuter nouns in -о / -е. It is where the hard/soft/mixed split (below) matters most.

Declension III — feminine soft and hushing nouns

This small but high-frequency class holds feminine nouns ending in a soft consonant (written -ь) or a hushing consonant, plus the irregular ма́ти. They share a tight set of endings (notice the instrumental -ю with a doubled consonant: сі́ллю, ні́ччю).

A reminder from the soft-sign gender page: not every -ь noun is Declension III — only the feminine ones are. Masculine -ь nouns (день, кінь, учи́тель) are Declension II. So you must know the gender first.

Declension IV — the small but mighty -ат-/-ен- extenders

This is the class learners forget, yet several of its members are everyday words. These are neuter nouns — names of baby animals and a handful of irregulars — that insert a piece (-ат-/-ят- or -ен-) between the stem and the ending in the oblique cases. The nominative looks short; the genitive suddenly grows.

The hard / soft / mixed split inside I and II

Here is the part that does the most work. Inside Declensions I and II, nouns further split by the type of consonant their stem ends in, and that split chooses between competing endings:

• Hard group — stem ends in a hard consonant (стіл, кни́га, шко́ла) → takes -о- endings: -ом, -ою; and -и in the plural (столи́).
• Soft group — stem ends in a soft consonant or -й (кінь, земля́, край) → takes -е- endings: -ем, -ею; and -і in the plural (коні́).
• Mixed (hushing) group — stem ends in ж, ч, ш, щ (ніж, душа́, гру́ша) → patterns between the two: -ем/-ею but -і in the plural.

The cleanest demonstration is the instrumental singular:

This three-way diagnosis is so important — it determines -ом vs -ем, -ою vs -ею, -ів vs -ей, столи́ vs коні́ — that it gets its own full treatment on the hard, soft, and mixed groups page. Treat it as the master key the case pages keep turning.

Each declension's full paradigm lives elsewhere

This page deliberately gives you only one or two cells per class — enough to recognise the family. The complete singular and plural paradigm for each case (all the genitive endings, the dative -і/-у choices, the instrumental, and so on) is built up case by case, starting with the genitive singular and the instrumental. Come back to this chart whenever you need to remember which declension a noun is in; go to the case pages for which ending it then takes.

Source-language comparison

For an English speaker, "declension class" has no equivalent at all — English nouns just add -s and -'s. The closest analogy is irregular plurals: English speakers already know that child → children and foot → feet belong to different "patterns." Ukrainian simply has four such patterns covering all nouns, chosen by gender and ending. The reassurance is that membership is predictable from the dictionary form, not something you memorise noun by noun.

For a learner from Russian, the four-declension framework will feel familiar — Russian uses an almost identical three-or-four-class scheme — but two cells differ noticeably. Declension IV's -ен- nouns (ім’я → і́мені) and the hushing/mixed group's -ем (ноже́м, where Russian also has ножо́м/ножём) line up roughly, but the specific endings diverge: Ukrainian's genitive, dative, and locative endings are not Russian's, and the famous masculine genitive -а/-у split (covered on the genitive page) follows Ukrainian's own rules. Use the Russian framework as scaffolding, never as a source of endings.

Common Mistakes

Key Takeaways

• Ukrainian nouns fall into four declensions, decided by gender + nominative ending.
• I: feminine and male -а/-я nouns (кни́га, суддя́). II: masculine consonant/-й/-о and neuter -о/-е (стіл, вікно́). III: feminine -ь and hushing (ніч, сіль, ма́ти). IV: the -ат-/-ен- extenders (теля́, ім’я́).
• You must know the gender first — only feminine -ь nouns are Declension III; masculine -ь nouns are Declension II.
• Declension IV is small but high-frequency (ім’я́, дитя́, baby animals) and reveals itself when the genitive grows longer than the nominative (теля́ → теля́ти).
• Inside I and II, the hard / soft / mixed split decides almost every competing ending (столо́м vs коне́м vs ноже́м) — it's the master key, detailed on its own page.