When talking about real estate, you will often need to describe the "biggest" house or the "best" location.
Definite Superlatives
When an adjective describes a specific, definite "most" or "-est" thing (like the oldest house), it takes the definite superlative form. Because you are pointing out a specific item, the adjective uses the weak declension, and the noun takes the attached definite article.
The weak declension endings for singular superlative adjectives are:
| Case | Masculine | Feminine | Neuter |
|---|
| Nominative | -i | -a | -a |
| Acc / Dat / Gen | -a | -u | -a |
In the nominative case, both feminine and neuter adjectives end in -a.
Neuter Nouns in Other Cases
For neuter nouns like húsið (the house) or hverfið (the neighborhood), the weak ending is -a in all four cases.
Feminine Nouns in Other Cases
For feminine nouns like fasteignin (the property) or íbúðin (the apartment), the weak ending changes to -u in the accusative, dative, and genitive cases.
Make sure each adjective matches the gender and case of its noun. Below, tilboðið (the offer) is neuter accusative (-a), while fasteignina (the property) is feminine accusative (-u).