“无恶不作”，汉语成语，字面意思是没有什么坏事不干（do every sort of evil thing）。形容做尽了坏事，可以翻译为“commit all sorts (all manner) of crimes；be as wicked as possible”。

例句：

杀人放火，无恶不作

commit murder, arson and every crime imaginable

侵略者到处抢掠屠杀，无恶不作。

Everywhere the invaders looted, killed and committed every other kind of atrocity.