Definite Forms
Danish doesn't use a separate word for “the” — instead, it adds a suffix to the noun. The suffix depends on the noun's gender.
The pattern
en-words → add -en
en bil → bilen (the car)
et-words → add -et
et hus → huset (the house)
Examples
Indefinite
Definite
English
en bil
bilen
the car
et hus
huset
the house
en bog
bogen
the book
et æble
æblet
the apple
en kat
katten
the cat
et barn
barnet
the child
Context tells you which form
Use the indefinite form for new/unknown things (“I saw a car”) and the definite form for known/specific things (“I saw the car”).