forsider is the feminine plural indefinite of forside.

forsideN

Kven

1etupuoliN

2etusivuN

3etuosaN

Norwegian Bokmål – Kvendict-nob-fkv/src/N_nobfkv.xml:21578Edit on GitHub Suggest

álgosiiduN; ovdasiiduN

Norsk-nordsamisk ordbokdict-nob-sme/src/N_nobsme.xml:179041Edit on GitHub Suggest

Case	Sg	Pl
Indef	forside	forsider
Def	forsiden / forsida	forsidene