Where does “toson” come from?

toson (Old Portuguese) comes from Late Latin tonsio, from Latin tondeō, from Proto-Indo-European tend-, from Proto-Indo-European temh₂- — to stretch, string; to cut.

Ancestry of “toson”, step by step

Step	Language	Word	Meaning
1	Late Latin	tonsio	shearing
2	Latin	tondeō	to shave, shear, clip
3	Proto-Indo-European	tend-	to stretch, to extend; to split, cut off
4	Proto-Indo-European	temh₂-	to stretch, string; to cut

Words derived from “toson”

tosão

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