追悔莫及

zhuīhuǐmòjí
too late for regrets (idiom); It is useless to repent after the event.

CEDICT

Entry Composition

1 追悔 zhuīhuǐ
  1. to repent
  2. remorse
2 莫 mò
  1. do not
  2. there is none who
3 及 jí
  1. and
  2. to reach
  3. up to
  4. in time for

Related entries

後悔莫及 hòuhuǐmòjí too late for regrets (idiom); It is useless to repent after the event.
悔之無及 huǐzhīwújí too late for regrets (idiom); It is useless to repent after the event.