Word Origin & History
frownlate 14c., from O.Fr. froignier "to frown or scowl, snort," related to frongne "scowling look," probably from Gaulish *frogna "nostril" (cf. Welsh ffroen "nose"), with a sense of "snort," or perhaps "haughty grimace." Related: Frowned; frowning. The noun is from 1580s.