Word Origin & History
joyearly 13c., "feeling of pleasure and delight," from O.Fr. joie, from L. gaudia, pl. of gaudium "joy," from gaudere "rejoice," from PIE base *gau- (cf. Gk. gaio "I rejoice," M.Ir. guaire "noble"). Joy-riding is Amer.Eng., 1908; joy stick is 1910, aviators' slang for the control lever of an airplane.