Danish builds an enormous share of its vocabulary by derivation — attaching a suffix to an existing root to make a new word of a new class. Once you recognise the productive suffixes, thousands of words stop being opaque items to memorise and become transparent constructions you can parse on sight (and sometimes coin yourself). This page covers the main suffixes that form adjectives and verbs, what each one means, and — critically — the inflection quirks some of them trigger, especially the adjectives that refuse the neuter -t ending. That last point is where learners most often go wrong, so it gets its own section.
Adjective-forming suffixes
-ig — the workhorse
-ig is the most productive adjective suffix in Danish, attaching to nouns and verbs to mean "characterised by, tending to". It usually corresponds to English -y or -ful.
Han er altid venlig over for nye kolleger.
He's always friendly toward new colleagues. (ven 'friend' → venlig)
Der var helt roligt i huset, da jeg kom hjem.
It was completely calm in the house when I got home. (ro 'calm/peace' → rolig)
-lig — quality and possibility
-lig overlaps with -ig but leans toward "pertaining to, -able, in the manner of". It often attaches to nouns to make "belonging to / characteristic of" adjectives, and to verbs for an "-able" sense.
Det er en helt menneskelig reaktion at blive bange.
Getting scared is a completely human reaction. (menneske 'human' → menneskelig)
Alle levende væsener er dødelige.
All living beings are mortal. (død 'death' → dødelig)
-som — disposition
-som forms adjectives meaning "inclined to, full of" — a tendency or disposition.
Trafikken var langsom hele vejen hjem.
The traffic was slow the whole way home. (lang 'long' → langsom)
Hun er en meget virksom person i lokalsamfundet.
She's a very active/effective person in the local community. (virke 'work/act' → virksom)
-bar — "-able"
-bar (cognate with English "-able" via "bear") attaches mainly to verbs to mean "capable of being X-ed". It is highly productive in technical and bureaucratic Danish.
Er den her gammel cykel overhovedet brugbar?
Is this old bike even usable? (bruge 'use' → brugbar)
Mælken er kun holdbar et par dage til.
The milk only keeps for a couple more days. (holde 'hold/keep' → holdbar)
-isk — relational and "-ic/-ish"
-isk forms relational adjectives, often from nouns of nationality, field, or abstract domain — English -ic, -ical, -ish.
Vi læser meget nordisk litteratur i år.
We're reading a lot of Nordic literature this year. (nord 'north' → nordisk)
Det er ikke en logisk konklusion.
That's not a logical conclusion. (logik 'logic' → logisk)
-et — "covered with / having"
-et forms adjectives from nouns meaning "having, covered with, marked by" — the result of a feature or substance. (Note: this is the suffix, distinct from the look-alike past-participle/perfect ending.)
Hun havde et stribet tørklæde på.
She was wearing a striped scarf. (stribe 'stripe' → stribet)
Tag ikke det snavsede viskestykke.
Don't take the dirty dish towel. (snavs 'dirt' → snavset)
-løs — "-less"
-løs is the exact equivalent of English "-less": absence of the root noun.
Han følte sig helt hjælpeløs i situationen.
He felt completely helpless in the situation. (hjælp 'help' → hjælpeløs)
Hun har været arbejdsløs i tre måneder.
She's been unemployed for three months. (arbejde 'work' → arbejdsløs)
Verb-forming suffixes
-ere — verbs from loans
-ere is the great loanword-verbaliser: it turns borrowed (typically Latinate/French/German) roots into Danish verbs. It is enormously productive — almost any modern international concept can be verbed with -ere.
Vi skal organisere hele arrangementet selv.
We have to organise the whole event ourselves. (organisation → organisere)
Telefonen fungerer ikke ordentligt mere.
The phone doesn't work properly anymore. (function → fungere)
-ne — inchoative verbs ("become X")
-ne forms inchoative verbs from adjectives — verbs meaning "to become / grow X". This is a tidy little pattern English usually handles with "get/grow + adjective".
Han blegnede, da han hørte nyheden.
He went pale when he heard the news. (bleg 'pale' → blegne)
Æblerne er begyndt at modne på træet.
The apples have started to ripen on the tree. (moden 'ripe' → modne)
Inflection quirks: when adjectives block the neuter -t
Here is the part learners most need. Danish adjectives normally take -t in the neuter (after an et-word): et stort hus "a big house". But several derived-adjective endings resist that -t, and adding it is a classic, conspicuous error.
Two groups in particular:
Adjectives in -sk generally do not take neuter -t (for -isk adjectives and most words ending in -sk). You keep the bare form in the neuter.
❌ et logiskt valg
Incorrect — -sk adjectives don't take neuter -t.
✅ et logisk valg
a logical choice
Adjectives in -et (the "having / covered with" suffix, and look-alike forms) also do not add a further -t in the neuter — the form is already settled.
❌ et stribett tørklæde
Incorrect — -et adjectives don't take an additional neuter -t.
✅ et stribet tørklæde
a striped scarf
By contrast, the suffixes that end in a normal consonant or -ig/-lig/-som/-bar/-løs do behave regularly and take -t in the neuter:
✅ et venligt svar
a friendly reply (-lig → regular neuter -t)
✅ et holdbart materiale
a durable material (-bar → regular neuter -t)
For the full agreement system these quirks sit inside, see adjectives/indefinite-agreement. And because derivation and compounding are the two halves of Danish word-building, the companion page word-formation/compounding is worth reading alongside this one.
Common Mistakes
❌ et praktiskt eksempel
Incorrect — -sk adjective; no neuter -t.
✅ et praktisk eksempel
a practical example
❌ et snavsett gulv
Incorrect — -et adjective; no extra neuter -t.
✅ et snavset gulv
a dirty floor
❌ et nordiskt sprog
Incorrect — -isk (an -sk ending); stays bare in the neuter.
✅ et nordisk sprog
a Nordic language
❌ et hjælpløst forsøg (dropping the -e-)
Incorrect spelling of the root — the -løs adjective from hjælp keeps its linking vowel: hjælpeløst.
✅ et hjælpeløst forsøg
a helpless attempt (-løs takes regular neuter -t: -løst)
The pattern to take away: most adjective suffixes (-ig, -lig, -som, -bar, -løs) inflect regularly and take -t in the neuter, while the -sk and -et families are the stubborn exceptions that stay bare. On the verb side, -ere verbalises loans and -ne turns adjectives into "become-X" verbs. Recognising these suffixes does double duty — it unlocks the meaning of unfamiliar words and tells you, in advance, how the word will behave when you inflect it.
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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.
- Compounding in DepthB1 — How Danish builds solid compounds — the head-final structure, the linking morphemes -s- and -e- and when each appears, recursive stacking, and the right-to-left strategy for decoding monsters like kvindehåndboldlandshold.