破鏡再び照らさず
Meanings
1
a broken relationship can never be repaired; a divorced couple are never reconciled
Proverb meaning that once a relationship (especially marriage) is broken, it cannot be mended, just as a broken mirror will never reflect light again. The literal image is 'a broken mirror will never shine again'.
As the proverb goes, 'a broken mirror will never shine again' — once a relationship is broken, it can never be repaired.