gǎi​guò

reform

改过 (改過) gǎi​guò
reform verb
to correct one's errors; to mend one's ways

Since you know you are wrong, you should have the courage to correct your ways and avoid making the same mistake again.

Frequency

Movie subtitles
2.06 per million appears in 1% of films
Written text
2.17 per million

Sources

Definitions
CC-CEDICT