trehuset is the neuter singular definite of trehus.

trehusN

Kven

puutaloN

Norwegian Bokmål – Kvendict-nob-fkv/src/N_nobfkv.xml:96580Edit on GitHub Suggest

muorraviessuN

Norsk-nordsamisk ordbokdict-nob-sme/src/N_nobsme.xml:52592Edit on GitHub Suggest

Case	Sg	Pl
Indef	trehus	trehus
Def	trehuset	trehusa