Questions & Answers about Bíllinn kostar tuttugu þúsund.
In Icelandic, the definite article is usually attached to the noun.
- bíll = car
- bíllinn = the car
So -inn here is the masculine singular nominative form of the definite article. Icelandic does have separate words that can function a bit like the in some contexts, but the normal everyday pattern is the suffix article.
This sentence also shows a useful contrast with English: Icelandic normally has no true indefinite article. So bíll can mean a car or just car, depending on context.
The infinitive is að kosta = to cost.
In the present tense, the form changes depending on the subject:
- ég kosta = I cost
- þú kostar = you cost
- hann/hún/það kostar = he/she/it costs
Since bíllinn is singular and means the car / it, the correct form is kostar.
So:
- Bíllinn kostar ... = The car costs ...