Where does “cauterizer” come from?

cauterizer (Middle French) comes from Old French cauteriser, from Latin cauterizo, from Ancient Greek καυτηριάζω, from Ancient Greek καυτήρ, from Ancient Greek καίω, from Proto-Hellenic *káyyō.

cauterizer (Middle French): to toughen; to harden

Definitions

to toughen; to harden

Ancestry of “cauterizer”, step by step

Step	Language	Word	Meaning
1	Old French	cauteriser	to cauterize
2	Latin	cauterizo	to burn with a hot iron
3	Ancient Greek	καυτηριάζω	to brand
4	Ancient Greek	καυτήρ	branding iron
5	Ancient Greek	καίω	I light, kindle, set on fire; I burn, burn up; I...
6	Proto-Hellenic	*káyyō	—

Every word from Proto-Hellenic *káyyō →Every word from Ancient Greek καίω →Every word from Ancient Greek καυτήρ →