Where does “cerebrum” come from?

cerebrum (Middle English) comes from Latin cerebrum, from Proto-Italic kerazrom, from Proto-Indo-European ḱerh₂-s-ro, from Proto-Indo-European ḱerh₂- — head, top; horn.

Ancestry of “cerebrum”, step by step

Step	Language	Word	Meaning
1	Latin	cerebrum	brain; skull
2	Proto-Italic	kerazrom	brain
3	Proto-Indo-European	ḱerh₂-s-ro	—
4	Proto-Indo-European	ḱerh₂-	head, top; horn

Every word from Proto-Indo-European ḱerh₂- →

cerebrum — Etymology, Origin & Word History | Etymology Explorer