心こころを入いれ替かえる

expression, ichidan verb

turn over a new leaf; mend one's ways; reform

Used when someone resolves to change their attitude or behavior for the better, often after a mistake or failure.

• 彼かれは心こころを入いれ替かえて、真面目まじめに働はたらき始はじめた。

  He turned over a new leaf and started working seriously.

• もう一いち度どチャンスをあげるから、心こころを入いれ替かえてください。

  I'll give you one more chance, so please mend your ways.