毁于一旦

Traditional (Taiwan): 毀於一旦

huǐyúyīdàn ㄏㄨㄟˇ ㄩˊ ㄧ ㄉㄢˋ

    • ruined in a short time (esp. of sth that took a long time or great effort to achieve)

      idiom

Character by character

Sources