ventilen is the masculine singular definite of ventil.

ventilN

Kven

venttiiliN

Norwegian Bokmål – Kvendict-nob-fkv/src/N_nobfkv.xml:74208Edit on GitHub Suggest

ventiilaN

Norsk-nordsamisk ordbokdict-nob-sme/src/N_nobsme.xml:234599Edit on GitHub Suggest

Case	Sg	Pl
Indef	ventil	ventiler
Def	ventilen	ventilene