decollete (adj.)youdaoicibaDictYouDict[decollete 词源字典]
1831, from French décolleté, past participle of décolleter "to bare the neck and shoulders," from de- (see de-) + collet "collar of a dress," diminutive of col (Latin collum) "neck" (see collar (n.)). Not to be confused with decollate (v.), which means "to behead."[decollete etymology, decollete origin, 英语词源]