decollete (adj.) Look up decollete at Dictionary.com
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.)), from PIE root *kwel- (1) "move round, turn about." Not to be confused with decollate (v.), which means "to behead."