Where does “सिपाही” come from?
सिपाही (Hindi) comes from Classical Persian سپاهی, from Persian سپاه, from Proto-Iranian *cwáHdah, from Proto-Indo-Iranian *ćwáHdʰaH, from Proto-Indo-European ḱwéh₁-dʰ-o-h₁.
सिपाही (Hindi): soldier, fighter; pawn
Ancestry of “सिपाही”, step by step