Refers to morally or legally wrong acts; often used in serious, formal, or religious contexts. Can imply a sense of guilt or evil.
In that society, drinking alcohol was regarded as a vice.
He acknowledged his crime/sin and deeply regretted it.
罪悪のない社会を築くのは難しい。
It is difficult to build a society without vice.
In his youth, he committed many sins.
罪 is the broad, everyday word for sin, crime, or guilt, while 罪悪 is more formal and emphasizes the inherently evil nature of the act.
悪事 refers to a specific wrongdoing or evil deed someone commits, while 罪悪 is the more abstract concept of sin or moral wrongness itself.
善行 means a good or virtuous deed, the moral opposite of 罪悪, which means sin or vice.
feelings of guilt; guilty conscience
Compound of 罪 (つみ, 'sin, crime') and 悪 (あく, 'evil, bad'). The reading ざいあく is the on'yomi of both characters.