Where does “grutgen” come from?

grutgen (Welsh) comes from Welsh cen, from German kenn, from Proto-Indo-European sken-, from Proto-Indo-European (s)ken- — to peel; to split off; peel.

grutgen (Welsh): tartar

Definitions

tartar

Ancestry of “grutgen”, step by step

grutgen traces back through two separate lines of ancestry.

via Welsh cen

Step	Language	Word	Meaning
1	Welsh	cen	scurf, dandruff
2	German	kenn	singular imperative of kennen
3	Proto-Indo-European	sken-	to split off
4	Proto-Indo-European	(s)ken-	to peel; to split off; peel

via Welsh grut

Step	Language	Word	Meaning
1	Welsh	grut	grit
2	Middle English	grit	—

Every word from Proto-Indo-European (s)ken- →Every word from Proto-Indo-European sken- →Every word from German kenn →