Where does “grīma” come from?

grīma (Frankish) comes from Proto-Germanic grīmô, from Proto-Indo-European gʰrēy-, from Proto-Indo-European gʰer- — to rub; to stroke; to grind.

Ancestry of “grīma”, step by step

Step	Language	Word	Meaning
1	Proto-Germanic	grīmô	mask; visor; helmet
2	Proto-Indo-European	gʰrēy-	to smear; to paint, streak, smear
3	Proto-Indo-European	gʰer-	to rub; to stroke; to grind

grīma — Etymology, Origin & Word History | Etymology Explorer