To make smooth and glossy by rubbing with something.
M.E. polishen, from O.Fr. poliss-, pr.p. stem of polir "to polish," from L. polire "to polish, make smooth," of unknown origin.
Nasu kardan (Dehxodâ) "to polish, smooth, brighten," from nasu "smooth, bright" (mirror, sword), Mid.Pers. Manichean Parthian nswg "tender," from Proto-Iranian *ni-sau-, from prefix ni- "down," → ni- (PIE), + *sau- "to rub;" cf. Mod.Pers. sâbidan, variants sâyidan, pasâvidan "to touch, to rub;" Khotanese sauy- "to rub;" Sogdian ps'w- "to touch."
Verbal noun of → polish.