summer is the masculine plural indefinite of sum.

sumN

Kven

summaN

Norwegian Bokmål – Kvendict-nob-fkv/src/N_nobfkv.xml:67063Edit on GitHub Suggest

summáN; submiN

Norsk-nordsamisk ordbokdict-nob-sme/src/N_nobsme.xml:31462Edit on GitHub Suggest

Case	Sg	Pl
Indef	sum	summer
Def	summen	summene