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prowess

/ˈpɹaʊɪs/ noun

Origin

From Middle English prowesse, prouwesse, proues, prouesce, prouesse (“bravery in battle; act of bravery; excellence; nobility of character; intelligence”), from Old French proeche, proesce, proeësche (“goodness; excellence; bravery”), from Old French preu, prou, prouz, proz, pruz (“good; excellent; brave”). Compare English proud.

From Wiktionary, via Kaikki.org (CC BY-SA)