Where does “تن” come from?

تن (Urdu) comes from Sanskrit तनू, from Proto-Indo-Iranian tanúHs, from Proto-Indo-European tenuh₂- — body.

تن (Urdu): body, self

Definitions

Step	Language	Word	Meaning
1	Sanskrit	तनू	body, person, self; form or manifestation
2	Proto-Indo-Iranian	tanúHs	body, self
3	Proto-Indo-European	tenuh₂-	body

تن — Etymology, Origin & Word History | Etymology Explorer