c.1290,
prouesse, from O.Fr.
proece (Fr.
prouesse), from
prou, variant of
prud "brave, valiant," from V.L.
*prodem (cf. Sp.
proeza, It.
prodezza; see
proud).
Prow was in M.E. as a noun meaning "advantage, profit," also as a related adj., but it has become obsolete.