Swedish Adjectives: Overview | Swedish Grammar

English adjectives never change: a red car, a red house, red cars — red is red every time. This is the single biggest thing to unlearn for Swedish. Swedish adjectives agree with their noun, changing form for the noun's gender and number, and — the part that surprises learners most — they agree even when they sit on the far side of the verb (the house is red → huset är rött). This page maps the whole adjective system at altitude and routes you to the pages that drill each piece.

Two declensions, one idea

A Swedish adjective has two "moods" of agreement, chosen by whether the noun phrase is indefinite ("a red car") or definite ("the red car"):

The indefinite (strong) declension — used with indefinite nouns. It has three forms that agree with gender and number: a base form, a -t form, and an -a form.
The definite (weak) declension — used after den/det/de, after possessives, and after genitives. It has essentially one form, ending in -a (with an optional -e for a known male person).

	en-word: bil	ett-word: hus	plural
Indefinite (strong)	en röd bil	ett rött hus	röda bilar / röda hus
Definite (weak)	den röda bilen	det röda huset	de röda bilarna

Notice the shape of the whole thing: the indefinite declension makes the adjective work for its agreement — three different endings depending on gender and number. The definite declension is lazy — it collapses everything to -a. That asymmetry is the heart of the system.

The indefinite (strong) forms: röd / rött / röda

With an indefinite noun, the adjective takes one of three forms:

base form with a common-gender (en) noun: en röd bil
-t
with a neuter (ett) noun: ett rött hus
-a
in the plural: röda bilar, röda hus

Jag vill ha en röd bil, inte en blå.

I want a red car, not a blue one. röd = base form with an en-word.

De har köpt ett rött hus på landet.

They've bought a red house in the country. rött = neuter -t with an ett-word.

Det stod tre röda bilar utanför.

There were three red cars parked outside. röda = plural -a, regardless of gender.

This three-way set (röd / rött / röda) is the workhorse you will use constantly. It is drilled in full on The Indefinite (Strong) Declension, and the tricky neuter -t (with its spelling changes) has its own page: The Neuter -t.

The definite (weak) form: just -a

The moment a noun phrase becomes definite, the adjective stops juggling forms and settles on -a. This happens after the front article den/det/de, after a possessive (min, din, hans...), and after a genitive (Annas):

Den röda bilen är min.

The red car is mine. After den, the adjective is röda — definite -a.

Det röda huset syns långt bort.

The red house is visible from afar. After det, still röda — the neuter -t disappears in the definite!

Min röda bil står på verkstaden.

My red car is at the garage. After a possessive (min), the adjective is röda.

The key surprise: the neuter -t (rött) never appears in the definite. Det röda huset, not det rött huset. Once you are inside a definite phrase, the adjective no longer agrees for gender — it is -a for en-words, ett-words, and plurals alike. This simplification, and the full list of triggers, is on The Definite (Weak) Declension.

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Two declensions, one trigger: indefinite noun → three forms (röd / rött / röda); definite noun → one form (-a). The hardest single fact to remember is that the neuter -t vanishes in the definite: ett rött hus but det röda huset.

Adjectives agree even predicatively

Now the feature that genuinely surprises learners from most languages, English included. In English, a predicate adjective (after to be, to seem, to become) never inflects: the house is red, the cars are red — red stays put. In Swedish, the predicate adjective agrees just like an attributive one, for gender and number:

Bilen är röd men huset är rött.

The car is red but the house is red. Predicative agreement: röd (en) vs rött (ett) — both 'is red', but the form follows the subject's gender.

Bilarna är gamla och däcken är slitna.

The cars are old and the tyres are worn. Plural subjects → plural -a on the predicate adjective too.

Soppan blev kall medan vi väntade.

The soup got cold while we waited. blev ('became') is also a linking verb → kall agrees with soppan (en).

So agreement is everywhere an adjective describes a noun — in front of it (ett rött hus) and across a linking verb (huset är rött). The one thing that differs between the two positions: predicative adjectives never use the definite -a; they use the indefinite three-form set even when the subject is definite. Huset är rött (neuter -t), not huset är röda. We flag this here and detail it on the form pages.

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Predicative agreement is the early trap. Huset är rött — the adjective takes the neuter -t even though it's after "is," because Swedish agrees adjectives in both positions. English speakers reliably forget this and say huset är röd.

Stems with å, ä, ö and other quirks

Vowel-final stems still take the endings, sometimes doubling a consonant: blå ("blue") → blått (neuter) → blåa or blå (plural). Adjectives already ending in -t or in stressed vowels, and a handful of irregulars (liten/litet/små, gammal/gammalt/gamla), bend the rules — those live on The Neuter -t and the irregulars page. The headline for now: even å/ä/ö stems take the ordinary endings.

Himlen är blå och havet är blått.

The sky is blue and the sea is blue. blå (en) vs blått (ett) — vowel stem, neuter doubles to -tt.

How the rest of this group fits together

Indefinite forms:The Indefinite (Strong) Declension — the röd / rött / röda system.
Definite forms:The Definite (Weak) Declension — the -a after den/det/de.
The neuter ending:The Neuter -t — when -t doubles, vanishes, or causes spelling changes.
Comparison:Comparison: Overview — bigger, biggest, större, störst.

Common Mistakes

❌ ett röd hus

Incorrect — a neuter (ett) noun needs the -t form: rött.

✅ ett rött hus

a red house.

❌ röd bilar

Incorrect — the plural needs -a: röda.

✅ röda bilar

red cars.

❌ Huset är röd.

Incorrect — predicative adjectives agree too; huset is neuter, so rött.

✅ Huset är rött.

The house is red.

❌ det rött huset

Incorrect — in the definite, the neuter -t disappears; the adjective is -a.

✅ det röda huset

the red house.

❌ en stor bil, ett stor hus, stor bilar

Incorrect — leaving the adjective uninflected throughout (the English habit). It must agree.

✅ en stor bil, ett stort hus, stora bilar

a big car, a big house, big cars.

Key Takeaways

Swedish adjectives agree with their noun — unlearn the English habit of an invariable adjective.
Indefinite (strong) = three forms: base (en), -t (ett), -a (plural): röd / rött / röda.
Definite (weak) = one form, -a: after den/det/de, possessives, and genitives — and the neuter -t disappears here (det röda huset).
Agreement happens predicatively too (huset är rött), unlike English — this is the early trap. Predicatives use the indefinite three-form set, never the definite -a.
Even å/ä/ö stems take the normal endings (blå → blått).

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