tunnelen is the masculine singular definite of tunnel.

tunnelN

Kven

tunneliN

Norwegian Bokmål – Kvendict-nob-fkv/src/N_nobfkv.xml:71103Edit on GitHub Suggest

tuneallaN

Norsk-nordsamisk ordbokdict-nob-sme/src/N_nobsme.xml:36008Edit on GitHub Suggest

Case	Sg	Pl
Indef	tunnel	tunneler
Def	tunnelen	tunnelene