The comparative is the form you reach for whenever you say something is more X than something else: bigger, older, more interesting. Polish, exactly like English, has two strategies — a one-word synthetic form (English big → bigger; Polish duży → większy) and a two-word analytic form (English more interesting; Polish bardziej interesujący). The split between them follows the same instinct as in English, which is the good news. The complication is that the Polish synthetic suffix usually mutates the stem, so the comparative is rarely just "base + ending."
The synthetic comparative: -szy
The default synthetic ending is -szy (masculine), -sza (feminine), -sze (neuter). It attaches to the adjective stem — that is, the part left after you strip the -y/-i of the dictionary form.
Mój brat jest starszy ode mnie o trzy lata.
My brother is three years older than me.
Ten model jest nowszy, ale droższy.
This model is newer but more expensive.
W zimie dni są krótsze, a noce dłuższe.
In winter the days are shorter and the nights longer.
Watch the stems in those examples — they are not untouched:
| Base | Comparative | What happens to the stem |
|---|---|---|
| nowy (new) | nowszy | no change |
| stary (old) | starszy | no change |
| młody (young) | młodszy | no change |
| drogi (expensive) | droższy | g → ż |
| długi (long) | dłuższy | g → ż (and the vowel lengthens in spelling) |
| wysoki (tall/high) | wyższy | s + k → ż, stem syllable drops |
| ciężki (heavy) | cięższy | k drops before -szy |
| tani (cheap) | tańszy | n → ń (soft-stem adjective) |
The mutations are not random; they are the same softening processes you meet everywhere in Polish before a front-like ending. The velars g, k, ch are especially prone to it: drogi → droższy, wysoki → wyższy, lekki → lżejszy (light). If you have already met the consonant mutations reference, the comparative is one more place those rules fire.
The -ejszy variant for awkward clusters
When the bare -szy would crash into a difficult consonant cluster, Polish inserts a buffer vowel and you get -ejszy / -ejsza / -ejsze instead. This is the regular outcome for most adjectives ending in -ny, -ły, -wy and similar.
| Base | Comparative |
|---|---|
| ładny (pretty) | ładniejszy |
| trudny (difficult) | trudniejszy |
| ważny (important) | ważniejszy |
| ciepły (warm) | cieplejszy |
| wesoły (cheerful) | weselszy |
Druga książka była ciekawsza niż pierwsza.
The second book was more interesting than the first.
Dzisiaj jest cieplej, więc weź lżejszą kurtkę.
It's warmer today, so take a lighter jacket.
Ta droga jest krótsza, ale tamta jest ładniejsza.
This road is shorter, but that one is prettier.
Not every adjective in this group needs the buffer vowel: some take plain -szy instead. ciekawy (interesting), for instance, has the standard comparative ciekawszy — not ciekawiejszy. When you're unsure whether a longer adjective takes -szy, -ejszy, or analytic bardziej, treat bardziej as the safe fallback (see below).
The four irregulars you cannot avoid
Four extremely common adjectives form suppletive comparatives — a completely different word, the way English has good → better. These are not optional knowledge; they appear constantly.
| Base | Comparative | English |
|---|---|---|
| dobry | lepszy | good → better |
| zły | gorszy | bad → worse |
| duży | większy | big → bigger |
| mały | mniejszy | small → smaller |
Twój pomysł jest lepszy od mojego.
Your idea is better than mine.
Pogoda jest dzisiaj gorsza niż wczoraj.
The weather is worse today than yesterday.
The analytic comparative: bardziej
For long adjectives, derived adjectives, and especially participles used adjectivally, Polish does not use a suffix at all. Instead it puts bardziej ("more") in front — the exact mirror of English more interesting rather than interestinger.
Jestem dzisiaj bardziej zmęczony niż zwykle.
I'm more tired today than usual.
Ona jest bardziej zainteresowana muzyką niż sportem.
She's more interested in music than in sport.
To wyjaśnienie jest bardziej skomplikowane, niż się wydaje.
This explanation is more complicated than it seems.
The reverse — "less X" — uses mniej: mniej zmęczony (less tired), mniej ważny (less important). There is no synthetic form for "less"; it is always analytic.
How do you know which strategy an adjective takes? The reliable signal is the same as in English: short, basic, native adjectives take the synthetic -szy (nowy, stary, tani, gruby); long or participial adjectives take bardziej (zmęczony, interesujący, zadowolony, kolorowy in careful style). Adjectives ending in -ący / -ony / -ny derived from verbs are nearly always bardziej words. When in doubt for a long adjective, bardziej is the safe default and never sounds wrong, whereas a made-up -szy form (e.g. zmęczeńszy ❌) sounds broken.
Comparatives decline like ordinary adjectives
Crucially, once formed, a comparative is just an adjective. It agrees in gender, number and case with its noun, taking the full ordinary adjective endings.
Szukam tańszego hotelu w centrum.
I'm looking for a cheaper hotel in the centre.
Rozmawiałem z młodszą siostrą Anny.
I spoke with Anna's younger sister.
So tańszy → tańszego (genitive), tańszemu (dative), tańszym (locative/instrumental) and so on, following the same paradigm laid out on the full declension page. The comparative suffix -sz- simply sits inside the word; the case endings ride on top of it.
Common Mistakes
❌ Ten samochód jest więcej drogi.
Incorrect — using więcej ('more' for quantity) instead of the comparative.
✅ Ten samochód jest droższy.
This car is more expensive.
English more is one word for both more bread (quantity) and more expensive (degree); Polish splits them. Więcej is for amounts (więcej chleba), bardziej is for the degree of an adjective — and for short adjectives you use the -szy suffix, not a separate word at all.
❌ Mój dom jest bardziej duży niż twój.
Incorrect — using bardziej with a short adjective that has its own comparative.
✅ Mój dom jest większy niż twój.
My house is bigger than yours.
You cannot stack bardziej onto an adjective that already has a synthetic comparative. Bardziej duży is doubly wrong — both because duży is short (synthetic territory) and because its comparative is the irregular większy.
❌ On jest dobrzejszy w matematyce.
Incorrect — inventing a regular comparative for an irregular adjective.
✅ On jest lepszy w matematyce.
He's better at maths.
Dobry never forms a regular -szy; its comparative is the suppletive lepszy. Likewise zły → gorszy (not złejszy).
❌ To jest drogszy telefon.
Incorrect — forgetting the g → ż mutation.
✅ To jest droższy telefon.
This is a more expensive phone.
The velar g softens to ż before -szy: drogi → droższy, never drogszy. The same softening gives długi → dłuższy and wysoki → wyższy.
❌ Mój brat jest starszA ode mnie.
Incorrect — comparative not agreeing in gender.
✅ Mój brat jest starszy ode mnie.
My brother is older than me.
A comparative still has to agree. Brat is masculine, so it must be starszy, not the feminine starsza, even though English shows no such agreement.
Key Takeaways
- Short, basic adjectives take the synthetic -szy / -ejszy ending; long and participial adjectives take analytic bardziej.
- The synthetic ending often mutates the stem (drogi → droższy, wysoki → wyższy, tani → tańszy) — learn the messy ones as vocabulary.
- Four irregulars are unavoidable and high-frequency: lepszy, gorszy, większy, mniejszy.
- A comparative is still an adjective: it agrees in gender, number and case.
- For "less," use mniej
- adjective; there is no synthetic "less" form.
Related Topics
- The Superlative: naj- + ComparativeA2 — The Polish superlative is mechanically the comparative with naj- in front — najmłodszy, najlepszy, najbardziej zmęczony — plus how to say 'the best OF' with z + genitive.
- Than: niż versus od + GenitiveB1 — Polish has two ways to say 'than' after a comparative — niż keeping the original case, or od forcing the genitive — and they are not freely interchangeable.
- Consonant Mutation Reference TableB1 — The master table of Polish consonant alternations (alternacje) — every hard-to-soft mutation, its trigger, and where it surfaces in cases, verbs, comparatives and word formation.
- Full Adjective Declension TablesA2 — The complete adjective paradigm across all seven cases and both numbers — and why it's the most regular, learnable part of the Polish case system.
- Comparative and Superlative AdverbsB1 — Making adverbs comparative and superlative — the -ej comparative (szybciej, wolniej), the naj- superlative (najszybciej), the analytic bardziej/najbardziej, and the high-frequency suppletive irregulars lepiej, gorzej, więcej, mniej that govern the genitive.
- Genitive in Comparisons (od + genitive)B1 — How Polish expresses 'than' with od + the genitive case — wyższy od brata, starszy ode mnie — and how it differs from the niż construction English speakers over-rely on.