Rusten er under døren.

The rust is under the door.

Breakdown of Rusten er under døren.

• være: to be
• døren: the door
• under: under
• rusten: the rust

Questions & Answers about Rusten er under døren.

Is rusten a noun or an adjective here?

Here, rusten is a noun meaning the rust.

That can be confusing, because rusten can also be an adjective meaning rusty. Compare:

• Rusten er under døren. = The rust is under the door.
• Døren er rusten. = The door is rusty.

So in your sentence, rusten is the subject of the sentence, not an adjective describing something.

Why is it rusten and not just rust?

Because Norwegian usually puts the definite article on the end of the noun.

So:

• rust = rust
• rusten = the rust

This is a very common pattern in Norwegian. English uses a separate word (the), but Norwegian often uses an ending instead.

Why is it døren and not dør?