汉英词典
Chinese-English Dictionary
MEANING OF 一失足成千古恨
a single slip may cause everlasting sorrow (idiom)
Once the metaphor is seriously wrong or fallen, it will become a lifelong regret
谓偶一失足,遗恨终身。
shī chéng qiān hèn
EXAMPLE SENTENCES

一失足成千古恨,再回头已过百年身。

One single slip brings eternal regret, and looking back, your whole life has passed away.

后来,多亏达西挽救,莉迪亚才没有“一失足成千古恨”。

Later, thanks to Darcy save, Lydia was not "Lose a step makes the hate foreever."