Where does “treh₁-tu-” come from?

treh₁-tu- (Proto-Indo-European) comes from Proto-Indo-European terh₁- — to rub, turn; to drill, pierce.

Ancestry of “treh₁-tu-”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	terh₁-	to rub, turn; to drill, pierce

Words derived from “treh₁-tu-”

Every word from Proto-Indo-European terh₁- →

treh₁-tu- — Etymology, Origin & Word History | Etymology Explorer