yī​shī​zú​chéng​qiān​gǔ​hèn

a single slip brings eternal regret

Senses

一失足成千古恨 yī​shī​zú​chéng​qiān​gǔ​hèn (also yì​shī​zú​chéng​qiān​gǔ​hèn) a single slip brings eternal regret

Once a serious mistake is made, it leads to lifelong or eternal sorrow

References

see 一失足成千古恨/一失足成千古恨 一失足成千古恨,再回首已百年身/一失足成千古恨,再回首已百年身