Where does “retornare” come from?

retornare (Latin) comes from Latin torno, from Latin tornus, from Ancient Greek τόρνος, from Proto-Indo-European torh₂no-, from Proto-Indo-European terh₁- — to rub, turn; to drill, pierce.

retornare (Latin): to turn back

Definitions

to turn back

Ancestry of “retornare”, step by step

Step	Language	Word	Meaning
1	Latin	torno	I turn; I round off, make round
2	Latin	tornus	A turner's wheel, lathe; A potter's wheel
3	Ancient Greek	τόρνος	A tool similar to a pair of compasses used to...
4	Proto-Indo-European	torh₂no-	—
5	Proto-Indo-European	terh₁-	to rub, turn; to drill, pierce

Every word from Proto-Indo-European terh₁- →Every word from Proto-Indo-European torh₂no- →Every word from Ancient Greek τόρνος →