Where does “calterire” come from?

calterire (Late Latin) comes from Latin cauterium, from Ancient Greek καυτήρ, from Ancient Greek καίω, from Proto-Hellenic *káyyō.

Ancestry of “calterire”, step by step

Step	Language	Word	Meaning
1	Latin	cauterium	A branding iron
2	Ancient Greek	καυτήρ	branding iron
3	Ancient Greek	καίω	I light, kindle, set on fire; I burn, burn up; I...
4	Proto-Hellenic	*káyyō	—

calterire — Etymology, Origin & Word History | Etymology Explorer