noun
moral decadence; moral decline; moral corruption
Refers to a state or process of moral decay in society, culture, or individuals. Often used in critical or analytical contexts.
現代社会の道徳退廃が問題視されている。
The moral decadence of modern society is seen as a problem.
彼は若者の道徳退廃を嘆いた。
He lamented the moral decline of young people.
Compound of 道徳 (morality) and 退廃 (decadence, decline). The exact historical derivation is uncertain, but the combination transparently conveys moral decay.