The Norwegian word for tree is
tre

Translations for tree and their definitions

tre	©
1. n. tree
2. n. wood
Dette bordet er lagd av tre. - This table is made of wood.
3. v. to step (in, out etc.), to tread
(military) Tre av! - Dismissed!
(legislation etc.) tre i kraft - come into effect, come into force
4. v. to thread
tre en nål - thread a needle