expression, godan verb (-su)
commit vice; do evil
A somewhat formal or literary expression for engaging in morally wrong acts. Not used in casual conversation.
彼は若い頃、不善を為したことを深く悔いている。
He deeply regrets having committed evil deeds in his youth.
Standard kanji spelling for this expression.
Kana spelling of the verb part; common in everyday writing.
More common and slightly less formal expression for committing a crime or wrongdoing.
Compound of 不善 (vice, evil) + を + 為す (to do, to commit). The verb 為す is a classical/literary equivalent of する.