Most Swedish adjectives are predictable: base form with en-words, -t with ett-words, -a in the plural and definite. (Those regular patterns live on Neuter Agreement and The Definite Form.) This page gathers the ones that misbehave. There are three groups, and they fail the regular rule in three different ways: some adjectives never inflect at all, some drop a vowel when you add an ending, and one — liten "small" — has four completely different stems. Knowing these by group, rather than meeting them one bruising surprise at a time, removes most of the friction.
Group 1: invariables (never change)
A closed set of adjectives takes no ending whatsoever — not -t, not -a. You use the same word for an en-word, an ett-word, the plural, and the definite. Trying to inflect them is the error.
The everyday core: bra (good), kul (fun), slut (over/finished), äkta (genuine/real), gratis (free of charge), and the color and fashion loans rosa (pink), lila (purple), beige, orange. (Not every loan freezes — turkos "turquoise" inflects normally for most speakers, turkost/turkosa — so when in doubt, listen for whether natives add the ending.)
Vi bor i ett rosa hus med en lila dörr.
We live in a pink house with a purple door. rosa and lila are invariable — never *rosat, never *lilat, regardless of the noun's gender.
Det var ett bra förslag och tre bra idéer.
That was a good suggestion and three good ideas. bra stays bra for ett-words and plurals alike.
Konserten är slut och biljetterna var gratis.
The concert is over and the tickets were free. slut and gratis don't agree with anything.
There is no rule that predicts membership — bra refuses to agree while its near-synonym god agrees normally (ett gott vin). You memorize the list. The color loans are the most regular sub-group: borrowed words ending in a vowel sound (rosa, lila, beige, orange) almost all stay invariable, which is at least a usable heuristic.
Group 2: syncopating stems (-el, -er, -en)
This is the group that produces the most "looks wrong but is right" forms. Adjectives whose base ends in -el, -er, or -en carry an unstressed -e- in the stem. The neuter -t attaches normally, but when you add the -a ending (plural/definite), Swedish drops that unstressed -e- — a process called syncope. So the -a does not simply tack on; it squeezes the stem.
| Base (en-word) | Neuter (ett-word, +t) | Plural / definite (-a, syncope) | Meaning |
|---|---|---|---|
| enkel | enkelt | enkla | simple |
| vacker | vackert | vackra | beautiful |
| mogen | moget | mogna | ripe / mature |
| öppen | öppet | öppna | open |
| gammal | gammalt | gamla | old |
Det var ett enkelt problem med enkla lösningar.
It was a simple problem with simple solutions. enkel → enkelt (neuter), but enkla in the plural — the -e- of -el drops before -a.
Vi köpte vackra blommor till den gamla damen.
We bought beautiful flowers for the old lady. vacker → vackra (NOT *vackera), gammal → gamla (NOT *gammala).
Fönstren är öppna och frukten är mogen.
The windows are open and the fruit is ripe. öppen → öppna in the plural; mogen stays mogen here (en-word, base form).
The trap is the obvious-but-wrong *vackera, *gammala, *öppena. English speakers naturally just append -a to the whole base; Swedish first deletes the unstressed vowel. Note also that gammal doubles its -l before -t (gammalt) but syncopates to a single -l before -a (gamla) — both shifts in one common word.
Group 3: liten — the suppletive star
Liten "small" is the most irregular adjective in the language, and — frustratingly for learners — one of the very first you need, since "small" comes up constantly. It does not just bend; it switches to four entirely different stems depending on form. Learn the whole paradigm as a single unit now and you sidestep a recurring error.
| Context | Form | Example |
|---|---|---|
| en-word, indefinite | liten | en liten hund |
| ett-word, indefinite | litet | ett litet hus |
| singular definite | lilla | den lilla hunden |
| plural (any gender) | små | små hundar / små hus |
Vi har en liten hund och ett litet hus.
We have a small dog and a small house. liten with the en-word, litet with the ett-word.
Den lilla flickan matade de små fåglarna.
The little girl fed the small birds. Definite singular → lilla; plural → små (with å!).
Det är bara små problem kvar — inget stort.
There are only small problems left — nothing big. små is the plural for both genders; there is no *litna or *litena.
Notice there is no regular plural built from liten: you cannot say *litna or *litena. The plural is the unrelated form små, with a long å. And the definite singular lilla is used in both genders (den lilla hunden, det lilla huset) and even survives in affectionate names and compounds (lillasyster "little sister"). Four stems, no overlap with the regular pattern — pure suppletion, like English go/went among verbs.
Min lillebror gillar de små bilarna bäst.
My little brother likes the small cars best. lille- in the compound (a frozen form), små in the plural.
A note on -en participles vs -en adjectives
Watch a subtlety inside Group 2. Some words ending in -en are perfect participles (skriven "written," stulen "stolen") and others are plain adjectives (mogen, öppen), but both behave the same way: the neuter is -et (moget, öppet, skrivet, stulet), and the plural/definite -a syncopates the unstressed -e- (mogna, öppna, skrivna, stulna). The unifying point is that the -a forms always drop the vowel — that single fact carries you through the whole group, whether the word started life as an adjective or a participle.
De stulna cyklarna hittades, men det stulna kortet var borta.
The stolen bicycles were found, but the stolen card was gone. stulen → stulna (plural, syncope) / stulet (neuter).
Common Mistakes
❌ ett rosat hus / ett brat förslag
Incorrect — rosa and bra are invariable; they take no neuter -t.
✅ ett rosa hus / ett bra förslag
a pink house / a good suggestion.
❌ vackera blommor / gammala hus
Incorrect — the -a ending syncopates the stem vowel: vacker → vackra, gammal → gamla.
✅ vackra blommor / gamla hus
beautiful flowers / old houses.
❌ öppena fönster
Incorrect — öppen → öppna (the unstressed -e- drops before -a).
✅ öppna fönster
open windows.
❌ litna hundar / litena hundar
Incorrect — liten has no regular plural; the plural is the suppletive form små.
✅ små hundar
small dogs.
❌ den liten flickan
Incorrect — the definite singular of liten is lilla, not liten.
✅ den lilla flickan
the little girl.
Key Takeaways
- Invariables (bra, kul, slut, äkta, gratis, and color loans rosa, lila, beige) take no ending in any context.
- Syncopating stems in -el/-er/-en drop their unstressed -e- before -a: vacker → vackra, öppen → öppna, enkel → enkla, gammal → gamla. The neuter -t leaves the stem intact (vackert, öppet, enkelt).
- liten is suppletive with four stems: liten (en-word), litet (ett-word), lilla (definite singular), små (plural). There is no *litna — the plural is små, with å.
- Memorize liten as a whole paradigm early; it appears constantly and is the most common single-word agreement error.
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Start learning Swedish→Related Topics
- Neuter Agreement: the -t FormA1 — When an adjective describes an ett-word, it takes a -t ending (ett rött hus, huset är rött) — and a small set of regular spelling shifts (röd → rött, glad → glatt) and invariable adjectives (bra, kul) account for nearly every case English speakers get wrong.
- The Definite (Weak) Declension (-a)A2 — The adjective form used in definite phrases — almost always -a regardless of gender and number (den stora bilen, det stora huset, de stora bilarna), with an optional -e for a known male referent (den unge mannen).
- Irregular Comparison and UmlautB1 — The closed set of Swedish adjectives that compare irregularly — suppletive families like bra→bättre→bäst and dålig→sämre→sämst, plus the umlaut group (stor→större→störst, ung→yngre→yngst) where the stem vowel changes and the endings switch to -re/-st.