ˋㄒㄧㄣxīn

  1. 自己改過更新重新做人史記·○·本紀》:死者不可復生不可改過自新無由。」漢書··匡衡》:比年大赦使百姓改行自新天下幸甚。」改過

to reform oneself, to mend one's ways and start life anew
se réformer