Where does “tonsure” come from?

tonsure (Middle English) comes from Old French tonsure, from Latin tonsūra, from Latin tondeō, from Proto-Indo-European tend-, from Proto-Indo-European temh₂- — to stretch, string; to cut.

Ancestry of “tonsure”, step by step

Step	Language	Word	Meaning
1	Old French	tonsure	tonsure (hair)
2	Latin	tonsūra	haircut
3	Latin	tondeō	to shave, shear, clip
4	Proto-Indo-European	tend-	to stretch, to extend; to split, cut off
5	Proto-Indo-European	temh₂-	to stretch, string; to cut

Words derived from “tonsure”

tonsure

Every word from Proto-Indo-European temh₂- →Every word from Proto-Indo-European tend- →Every word from Latin tondeō →