Ukrainian adjectives split into two declension types — hard (нови́й) and soft (си́ній) — and the soft type is the smaller, more easily forgotten half. The good news is that soft-stem declension is not a separate system you have to learn from zero. It is the same paradigm as the hard stem with one consistent twist: wherever the hard stem has a back vowel (-о-, -и-), the soft stem has the matching front series (-ьо-, -і-). So нове́ → синє, нового → синього, новим → синім. This page gives the full soft paradigm across all seven cases, lines each ending up against its hard equivalent, and lists which adjectives actually belong to this class — because the membership is what you have to memorise, not the endings.
Which adjectives are soft
Soft-stem adjectives are a small, mostly closed set, and almost all of them end in -ній in the masculine. You learn them as a list, the way you learn irregular verbs:
| Soft adjective | Meaning |
|---|---|
| си́ній | blue |
| да́вній | ancient, long-ago |
| ра́нній | early |
| пі́зній | late |
| дома́шній | home(made), domestic |
| сусі́дній | neighbouring, next-door |
| доро́жній | travel- (as in road/journey) |
| худо́жній | artistic, fiction (as in література) |
| торі́шній | last year’s |
| сере́дній | middle, average |
| тре́тій | third (the only soft ordinal) |
| безкра́їй | boundless |
Notice the recurring shapes: a large group ends in -жній (доро́жній, худо́жній) or -шній (дома́шній, торі́шній, вчора́шній "yesterday’s", сього́днішній "today’s"), and another in plain -ній (да́вній, сусі́дній, сере́дній). The -їй type (безкра́їй) is rare. If an adjective ends in -ій in the dictionary — not -ий — it is soft. That single orthographic cue is your test.
Це дома́шнє пе́чиво — учо́ра ма́ма пекла́, ще тепле́ньке.
This is homemade cookies — Mum baked them yesterday, still warm. — neuter дома́шнє, the soft -є ending.
У сусі́дній кварти́рі зно́ву ро́блять ремо́нт, ці́лий день све́рдлять.
In the next-door flat they’re renovating again, drilling all day. — soft feminine locative сусі́дній.
The full soft paradigm: си́ній
Here is си́ній run through all seven cases in every gender and the plural. Stress stays fixed on the first syllable throughout. The endings that carry the soft sign ь (-ього, -ьому) are the ones to watch.
| Case | Masculine | Neuter | Feminine | Plural |
|---|---|---|---|---|
| Nominative | си́ній | си́нє | си́ня | си́ні |
| Genitive | си́нього | си́нього | си́ньої | си́ніх |
| Dative | си́ньому | си́ньому | си́ній | си́нім |
| Accusative | = nom. or gen. | си́нє | си́ню | = nom. or gen. |
| Instrumental | си́нім | си́нім | си́ньою | си́німи |
| Locative (на/у) | си́ньому / си́нім | си́ньому / си́нім | си́ній | си́ніх |
| Vocative | = nom. | = nom. | = nom. | = nom. |
Two cells need a word. The masculine accusative copies the nominative (си́ній) for an inanimate noun and the genitive (си́нього) for an animate one — exactly as in the hard type. The masculine/neuter locative has two licensed forms, си́ньому and си́нім; both are correct, with си́ньому the more common in speech and writing.
Ме́шкаю в да́вньому буди́нку в це́нтрі — сте́лі ви́сокі, ві́кна вели́чезні.
I live in an old building in the centre — high ceilings, huge windows. — masculine locative да́вньому, soft -ьому.
Подзвони́ли із сусі́днього села́ — про́сять допомогти́ з во́дою.
They called from the neighbouring village — asking for help with water. — neuter genitive сусі́днього.
Уве́сь день ми милува́лися безкра́їм сте́пом за вікно́м по́тяга.
All day we admired the boundless steppe out the train window. — instrumental безкра́їм.
Hard vs soft, ending by ending
The whole point of the soft type is that it is predictable from the hard type. Put the two paradigms side by side and the rule jumps out: every soft ending is the hard ending with its back vowel fronted and, where needed, a soft sign inserted.
| Case / form | Hard (нови́й) | Soft (си́ній) | What changed |
|---|---|---|---|
| masc. nom. | нови́й | си́ній | -ий → -ій |
| neut. nom. | нове́ | си́нє | -е → -є |
| fem. nom. | нова́ | си́ня | -а → -я |
| masc./neut. gen. | ново́го | си́нього | -ого → -ього |
| masc./neut. dat. | ново́му | си́ньому | -ому → -ьому |
| masc./neut. instr. | нови́м | си́нім | -им → -ім |
| fem. gen. | ново́ї | си́ньої | -ої → -ьої |
| fem. instr. | ново́ю | си́ньою | -ою → -ьою |
| plural gen./loc. | нови́х | си́ніх | -их → -іх |
| plural instr. | нови́ми | си́німи | -ими → -іми |
| plural nom. | нові́ | си́ні | identical: both -і |
The last row is worth pausing on. The plural nominative is -і for both types — нові́ and си́ні look like the same ending, because the hard plural nominative was already fronted. That is why you cannot tell a hard adjective from a soft one by its plural-nominative form alone; you have to know the dictionary word. Everywhere else the soft series is visibly different: -ього against -ого, -ьому against -ому, -ім against -им, -іх against -их, -іми against -ими.
Купи́ли з рук дві си́ні ва́зи — таки́х уже́ ніде́ не зна́йдеш.
We bought two blue vases second-hand — you won’t find ones like that anywhere now. — plural nominative си́ні, the ending that looks hard but isn’t.
Ї́здили в го́ри з на́шими да́вніми друзя́ми — як у студе́нтські роки́.
We went to the mountains with our old friends — just like in our student years. — plural instrumental да́вніми, soft -іми.
The soft sign is part of the stem, not decoration
English speakers often treat the ь in си́нього, си́ньому as a stray mark and drop it. It is not optional: in the soft type the stem-final consonant is phonetically soft, and the ь is how Ukrainian spelling shows that softness before -ого, -ому, -ою, -ої. Leave it out and you have written a non-word — синого, синому do not exist. The soft sign appears in exactly the genitive/dative/instrumental/locative singular endings that begin with -о (-ього, -ьому, -ьою, -ьої); before the front vowel -і (as in си́нім, си́ніх) no soft sign is written because the -і already signals softness.
За́втра до ра́ннього по́тяга тре́ба вста́ти о п’я́тій — ходи́ти ти́хо, щоб не розбуди́ти діте́й.
Tomorrow I have to get up at five for the early train — walk about quietly so as not to wake the kids. — masculine genitive ра́ннього with its obligatory soft sign.
Source-language comparison
For an English speaker, the soft type is simply a second spelling pattern to layer on top of the agreement habit — there is no English analogue to a "soft consonant," so trust the rule rather than your ear: -ій in the dictionary means use the front-vowel endings everywhere.
For a Russian speaker, the soft adjective type exists in Russian too (синий), but the Ukrainian forms are not interchangeable with the Russian ones — Ukrainian writes си́нього / си́ньому with the soft sign where Russian has синего / синему, and the plural genitive is си́ніх, not the Russian синих. The membership lists also differ. Treat си́ній as a Ukrainian word with a Ukrainian paradigm; do not back-fill the Russian endings, or you will produce forms that look almost right and read as a calque.
Common Mistakes
❌ синого буди́нку, синому буди́нку
Missing soft sign — the soft stem requires ь before the -ого/-ому endings: си́нього буди́нку, си́ньому буди́нку.
✅ си́нього буди́нку, си́ньому буди́нку
of the blue building, to the blue building — soft sign kept.
❌ з синим о́лівцем (hard ending on a soft adjective)
Stem-type error — the soft instrumental is -ім, not -им: з си́нім о́лівцем.
✅ з си́нім о́лівцем
with the blue pencil — soft instrumental -ім.
❌ дома́шний хліб
Wrong dictionary form — the adjective is soft дома́шній (-ій), so the masculine is дома́шній, not the hard-spelled дома́шний.
✅ дома́шній хліб
homemade bread — soft masculine -ій.
❌ у синих ва́зах (hard plural ending)
Stem-type error — the soft plural locative is -іх: у си́ніх ва́зах.
✅ у си́ніх ва́зах
in the blue vases — soft plural locative -іх.
❌ давні дру́зі but написа́в *давнім as if hard
Mixed paradigms — keep the soft series throughout: plural instrumental is да́вніми, not давними.
✅ зі ста́рими да́вніми друзя́ми
with old long-standing friends — soft plural instrumental да́вніми.
Key Takeaways
- Soft-stem adjectives are a small, mostly -ній set (си́ній, да́вній, ра́нній, пі́зній, дома́шній, сусі́дній, сере́дній, худо́жній, доро́жній, торі́шній, тре́тій, безкра́їй) — learn the list; the endings follow automatically.
- The dictionary ending is the test: -ій = soft, -ий = hard.
- The soft paradigm is the hard paradigm with the front/soft series: -ього, -ьому, -ім, -іх, -іми, plus fem. -ьої, -ьою and neut. -є.
- The soft sign ь is obligatory before the -ого/-ому/-ою/-ої endings (си́нього, си́ньому) — never drop it.
- The plural nominative -і is identical for both types (нові́ = си́ні in ending), so you must know the dictionary word to tell them apart.
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Start learning Ukrainian→Related Topics
- Hard-Stem Adjective DeclensionA2 — The full declension of hard-stem adjectives (the нови́й 'new' type) across all seven cases, three singular genders, and the plural. The endings — -ого, -ому, -им, -ою, -их, -ими — are the same set you meet on demonstratives and most pronouns, so learning нови́й unlocks the agreement endings for той, котри́й, and the bulk of the adjective system at once. Includes the velar-stem spelling (вели́кий → вели́кого but вели́кі) and the animacy split in the masculine and plural accusative.
- Adjectives: Agreement and the Two Stem TypesA1 — Ukrainian adjectives AGREE with their noun in gender, number, and case — the same word changes ending depending on what it describes. The dictionary form is masculine nominative singular (нови́й, си́ній); each adjective then has feminine, neuter, and plural forms and runs through all seven cases. Every adjective belongs to one of two stem types — HARD (нови́й / нова́ / нове́ / нові́) or SOFT (си́ній / си́ня / си́нє / си́ні) — and the stem type drives every ending.
- Hard, Soft, and Mixed Stem GroupsA2 — Almost every 'which ending?' question in Ukrainian noun declension reduces to one diagnosis: does the stem end in a hard consonant, a soft one, or a hushing ж/ч/ш/щ? Hard stems take о-endings (столо́м), soft stems take е-endings (коне́м), and mixed hushing stems pattern between them (ноже́м) — one three-way test that unlocks the whole case system.
- The Seven Cases: OverviewA1 — Ukrainian has SEVEN cases — nominative, genitive, dative, accusative, instrumental, locative, and a living vocative — each marked by an ending on the noun rather than by word order, so the same job English does with prepositions and position, Ukrainian does with the word's tail.
- Adjective Agreement in All CasesB1 — Every modifier in a Ukrainian noun phrase — possessive, demonstrative, and adjective alike — agrees with the head noun in gender, number, AND case all at once. Decline a full phrase like мій нови́й украї́нський друг through all seven cases (gen мого́ ново́го украї́нського дру́га, dat моє́му ново́му украї́нському дру́гові, instr мої́м нови́м украї́нським дру́гом) and the agreement chain falls into place: change the case of the noun, and every word in front of it changes to match.