Where does “skerm” come from?

skerm (Old High German) comes from Proto-West Germanic skirmi, from Proto-Germanic skirmiz, from Proto-Indo-European sḱer- — to caw, crow.

Ancestry of “skerm”, step by step

Step	Language	Word	Meaning
1	Proto-West Germanic	skirmi	fur, hide, pelt; covering, shelter, screen
2	Proto-Germanic	skirmiz	fur, hide, pelt; covering, shelter, screen
3	Proto-Indo-European	sḱer-	to caw, crow

skerm — Etymology, Origin & Word History | Etymology Explorer