Where does “cornere” come from?

cornere (Anglo-Norman) comes from Old French corne, from Vulgar Latin corna, from Latin cornua, from Latin cornū, from Proto-Indo-European ḱerh₂- — head, top; horn.

Ancestry of “cornere”, step by step

Step	Language	Word	Meaning
1	Old French	corne	horn
2	Vulgar Latin	corna	horn; nominative plural of cornum; accusative...
3	Latin	cornua	nominative plural of cornū; accusative plural of...
4	Latin	cornū	horn; antler
5	Proto-Indo-European	ḱerh₂-	head, top; horn

Words derived from “cornere”

Every word from Proto-Indo-European ḱerh₂- →Every word from Latin cornū →Every word from Latin cornua →