decadence
n. 堕落,颓废;衰落
例句
The empire had for years been falling into decadence.
这个帝国多年来已渐渐走向堕落。
《柯林斯英汉双解大词典》
Time, surely, to put social inclusion before defiant decadence.
显然应该是时候把社会包容置于目空一切的糜烂浮华之前了。
I said earlier that the decadence of our language is probably curable.
我前面说过我们的语言的堕落很可能还有救。