Once you know the regular Danish agreement pattern — base form for common-gender singular, -t for neuter singular, -e for plural and definite (en grøn bil, et grønt hus, grønne træer) — you will run straight into a wall of adjectives that refuse to play along. Some never change at all. Some change, but spell the change in a way you wouldn't predict. And one of the commonest adjectives in the language, lille, swaps to an entirely different word in the plural. This page catalogues every group so you stop guessing.
The good news for an English speaker: English adjectives never agree with their noun at all (a green car, a green house, green trees — green is frozen). So the invariable Danish adjectives are actually the ones that behave the way your instincts already expect. The trap is over-correction: once you've drilled grønt and grønne, you start bolting -t and -e onto words that should stay put.
Invariable adjectives — never add -t or -e
A large group of adjectives has the same form in all three slots. You use the bare dictionary form whether the noun is common, neuter, singular, or plural.
Adjectives ending in unstressed -e
If an adjective already ends in an unstressed -e, there is no room to add the plural/definite -e (you can't double it), and these words also block the neuter -t. They simply don't inflect.
et moderne køkken
a modern kitchen (neuter — but no -t)
de moderne lejligheder
the modern flats (plural — but no extra -e)
Det er en ægte læderjakke, ikke noget billigt plastik.
It's a genuine leather jacket, not some cheap plastic.
Reliable invariables in -e: moderne (modern), ægte (genuine), øde (deserted), stille (quiet), ringe (poor, slight), bange (afraid), lige (straight, even). Watch out for the trap that an -e ending is sometimes the plural of an inflecting adjective (spændt → spændte 'excited'); the invariables above carry the -e in the dictionary form itself, in every slot.
Adjectives ending in -s
Adjectives that end in -s are invariable, because Danish doesn't add -t or -e after that -s.
Vi har en fælles kalender, så vi kan se hinandens aftaler.
We have a shared calendar, so we can see each other's appointments.
Parkeringen er gratis efter klokken seks.
Parking is free after six o'clock.
To ens trøjer lå på hylden — jeg kunne ikke kende dem fra hinanden.
Two identical sweaters lay on the shelf — I couldn't tell them apart.
Common members: fælles (common, shared), gratis (free of charge), ens (identical, the same), stakkels (poor, pitiable), afsides (remote).
Adjectives ending in -a (mostly colours and loanwords)
Colour words borrowed into Danish that end in -a don't inflect.
Hun havde en lilla kjole og rosa sko på.
She was wearing a purple dress and pink shoes.
De lilla gardiner passer ikke til det orange tæppe.
The purple curtains don't match the orange rug.
Common members: lilla (purple), rosa (pink), orange (orange), beige (beige), turkis (turquoise — also invariable despite ending in -s-sound). Note that native colour words like rød, grøn, blå do inflect; it's only these loanwords that freeze.
Many adjectives ending in unstressed -et
Adjectives ending in an unstressed -et — including the large class of past participles used adjectivally — typically keep the same form across common and neuter, then add -e in the plural/definite by changing -et to -ede.
et fremmed sprog
a foreign language (neuter — no extra -t)
en lukket dør
a closed door
de lukkede butikker stod tomme om søndagen
the closed shops stood empty on Sundays
So fremmed (foreign) and participle-derived adjectives like lukket (closed), åbnet (opened), malet (painted) don't take -t in the neuter. Their plural is -ede: lukket → lukkede, fremmed → fremmede. See adjectives/participles-as-adjectives for the full participle story.
Irregular spellings — they inflect, but not how you'd guess
These adjectives do change, but the spelling of the -t and -e forms is irregular. Memorise them as fixed sets.
| Base (common sg.) | Neuter sg. (-t) | Plural / definite (-e) | Meaning |
|---|---|---|---|
| ny | nyt | nye | new |
| fri | frit | frie | free |
| blå | blåt | blå (also blåe) | blue |
| grå | gråt | grå (also gråe) | grey |
| rød | rødt | røde | red |
| glad | glad | glade | happy |
Two things to notice. First, ny and fri end in a stressed vowel, so the -t attaches cleanly (nyt, frit) but the plural keeps the -e visible (nye, frie) rather than swallowing it. Second, blå and grå (vowel å) take -t normally (blåt, gråt) but in the plural the standard modern form is just blå / grå with no ending — the form blåe / gråe exists but feels old-fashioned (literary).
Jeg har købt en ny telefon og et nyt cover til den.
I've bought a new phone and a new case for it.
Børnene fik frit valg mellem is og kage.
The children got a free choice between ice cream and cake.
Himlen var helt blå, og havet var næsten lige så blåt.
The sky was completely blue, and the sea was almost just as blue.
Watch the doubling that happens with short-vowel adjectives ending in a single consonant: in the plural the consonant doubles before -e.
| Base | Neuter | Plural / definite | Meaning |
|---|---|---|---|
| grøn | grønt | grønne | green |
| tynd | tyndt | tynde | thin |
| tør | tørt | tørre | dry |
| flot | flot | flotte | good-looking, smart |
De grønne marker strakte sig så langt, øjet rakte.
The green fields stretched as far as the eye could reach.
Nationality adjectives in -sk don't take neuter -t
Adjectives ending in -sk that denote nationality or language do not add -t in the neuter. You keep the bare form.
et dansk firma
a Danish company (neuter — but no danskt)
et svensk møbel
a Swedish piece of furniture
de tyske turister stod i kø ved indgangen
the German tourists stood in line at the entrance
So dansk, svensk, norsk, tysk, engelsk, fransk all stay bare in the neuter (*danskt is wrong). Non-nationality -sk adjectives are split: some take -t (frisk → friskt 'fresh'), some don't. Nationality ones are the clean rule: never -t. See adjectives/nationality for the full set.
Lille → små: a suppletive plural
The adjective lille (little, small) is genuinely irregular: it has no -t form and no -e form of its own. In the singular — common or neuter, indefinite or definite — you use lille. In the plural, you switch to a completely different word, små.
| Slot | Form | Example |
|---|---|---|
| Common sg. | lille | en lille hund |
| Neuter sg. | lille | et lille hus |
| Definite sg. | lille | den lille hund / det lille hus |
| Plural (all) | små | små hunde / de små huse |
Vi bor i et lille hus med en lille have.
We live in a little house with a little garden.
De små børn sov, mens de store så film.
The little children slept while the big ones watched a film.
This is suppletion — like English good/better, where the comparative comes from a different root. There is no logical shortcut: lille in the singular, små in the plural, full stop. (You may meet the form liden in older or set-phrase Danish — liden tue vælter stort læs 'a small tussock topples a big load', a proverb — but liden is archaic outside such fixed sayings.)
God — regular, but worth a glance
God (good) is fully regular — god, godt, gode — but it's so frequent that learners sometimes assume it must be irregular and start inventing forms. It isn't. The neuter is godt (which doubles as the adverb 'well') and the plural/definite is gode.
Det var et godt råd — tak for det.
That was good advice — thanks for it.
Vi havde nogle rigtig gode dage ved kysten.
We had some really good days by the coast.
Its comparison is where the irregularity hides (god → bedre → bedst) — that belongs to adjectives/comparison-irregular, not here.
Common Mistakes
❌ et modernet køkken
Incorrect — moderne is invariable; no -t
✅ et moderne køkken
a modern kitchen
English speakers, having just learned the neuter -t, slap it onto everything. Adjectives in -e, -s, -a, and unstressed -et take no -t.
❌ et danskt firma
Incorrect — nationality -sk adjectives take no neuter -t
✅ et dansk firma
a Danish company
❌ et gratist måltid
Incorrect — gratis ends in -s and is invariable
✅ et gratis måltid
a free meal
❌ to lilles børn
Incorrect — the plural of lille is små, not a form of lille
✅ to små børn
two little children
❌ en nyt cykel
Incorrect — ny is common-gender here; nyt is the neuter form
✅ en ny cykel
a new bicycle
The reverse of over-applying -t: forgetting that the irregular adjectives still inflect normally for gender. Cykel is common gender (en cykel), so you need the base ny, not the neuter nyt.
Key Takeaways
- Invariable (no change at all): adjectives in -e (moderne, ægte), -s (fælles, gratis, ens), -a (lilla, rosa), and unstressed -et (fremmed, lukket — plural in -ede).
- Nationality -sk adjectives take the plural -e but no neuter -t (dansk, svensk).
- Irregular spellings that still inflect: ny/nyt/nye, fri/frit/frie, blå/blåt/blå, grå/gråt/grå; consonant doubling in grøn/grønne, tynd/tynde.
- lille (singular) → små (plural) is suppletive — two different words for one adjective.
- The dominant error is over-applying -t; when in doubt with an -e/-s/-a/-et ending, leave the adjective alone.
Now practice Danish
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Start learning Danish→Related Topics
- Indefinite Adjective Agreement: -Ø, -t, -eA1 — The Danish indefinite (strong) adjective paradigm: base form for common singular, -t for neuter singular, -e for plural — plus the full set of spelling rules for when -t is and isn't added, and consonant doubling before -e.
- Definite Adjective Agreement: The -e FormA2 — After any definite trigger — the free article den/det/de, a demonstrative, a possessive, or a genitive — a Danish attributive adjective always takes -e, regardless of gender or number.
- Danish Adjectives: An OverviewA1 — A map of Danish adjective agreement: the indefinite paradigm (base / +t / +e) and the definite -e form, all driven by gender, number, and definiteness — presented as two forms to choose between.
- Nationality and Origin AdjectivesA2 — How Danish builds nationality adjectives, language names, and the word for a person from a country — all lowercase, unlike English.