Where does “tréphine” come from?

tréphine (French) comes from Latin trepanum, from Ancient Greek τρύπανον, from Ancient Greek τρυπάω — to bore, drill.

Ancestry of “tréphine”, step by step

Step	Language	Word	Meaning
1	Latin	trepanum	a drill
2	Ancient Greek	τρύπανον	borer, auger, rotated by a thong; trepan, a...
3	Ancient Greek	τρυπάω	to bore, drill

tréphine — Etymology, Origin & Word History | Etymology Explorer