decadence
n[U]
(a) (falling to a) lower level (in morals, art, literature, etc) esp after a period at a high level (道德倫理、 藝術、 文學等的)衰落, 墮落(尤指經過一鼎盛時期後)
the decadence of late Victorian art 維多利亞晚期文藝的衰落.
(b) attitude or behaviour that shows this 表現出此種衰落的態度或行為
the decadence of the rich Western countries 富裕的西方國家中的頹廢行為.