Where does “escarn” come from?

escarn (Old French) comes from Vulgar Latin escarnire, from Proto-Germanic skarnjan, from Proto-Germanic skeraną, from Proto-Indo-European sḱer- — to caw, crow.

Ancestry of “escarn”, step by step

Step	Language	Word	Meaning
1	Vulgar Latin	escarnire	—
2	Proto-Germanic	skarnjan	—
3	Proto-Germanic	skeraną	to shear
4	Proto-Indo-European	sḱer-	to caw, crow

Every word from Proto-Indo-European sḱer- →

escarn — Etymology, Origin & Word History | Etymology Explorer