matter is the feminine plural indefinite of matte.

matteN

Kven

mattaN; mattoN

Norwegian Bokmål – Kvendict-nob-fkv/src/N_nobfkv.xml:48061Edit on GitHub Suggest

rátnuN; máhtaN

Norsk-nordsamisk ordbokdict-nob-sme/src/N_nobsme.xml:54222Edit on GitHub Suggest

Case	Sg	Pl
Indef	matte	matter
Def	matten / matta	mattene