8 letters · 13 points in Scrabble
noun a surgical instrument used to remove sections of bone from the skull
verb operate on with a trephine
originBorrowed from French tréphine, from Latin trepanum, from Ancient Greek τρύπανον (trúpanon, “auger, borer”). Doublet of trepan.
Etymology from Wiktionary, CC BY-SA 3.0