silden is the masculine singular definite of sild.

sildN

Kven

silliN

Norwegian Bokmål – Kvendict-nob-fkv/src/N_nobfkv.xml:65663Edit on GitHub Suggest

sallitN; sildiN

Norsk-nordsamisk ordbokdict-nob-sme/src/N_nobsme.xml:78064Edit on GitHub Suggest

Case	Sg	Pl
Indef	sild	silder
Def	silden / silda	sildene