Where does “*प्रत्यर” come from?

*प्रत्यर (Sanskrit) comes from Sanskrit प्रति-, from Proto-Indo-European per-, from Proto-Indo-European pr̥tós — passed , crossed.

Ancestry of “*प्रत्यर”, step by step

StepLanguageWordMeaning
1Sanskritप्रति-around, upon
2Proto-Indo-Europeanper-before, in front; first; to go through
3Proto-Indo-Europeanpr̥tóspassed , crossed
Every word from Proto-Indo-European pr̥tós →Every word from Proto-Indo-European per- →Every word from Sanskrit प्रति- →