"The right house"
Translation:Det riktige huset
When an adjective describes a definitive noun, the adjective ends with -e (just like plural form of an adjective describing an indefinite noun).
En stor bil (A big car) // Den store bilen (The big car)
Et stort hus (A big house) // Det store huset (The big house)
Store Biler (Big cars) // De store bilene (The big cars)
There are a few rules, but in most cases you just have to learn the gender with the noun.
Nouns ending in -sjon, -het, -else and -dom in their base form are masculine.
Nouns ending in -em, -um, -gram, -tek and -eri are mostly neuter.
Nouns ending in -ing (when based on verbs) and -inne are feminine.
If you know the definite singular ending of the noun, you can use that to find the gender:
-en = masculine or feminine
-a = feminine
-et = neuter