悔不當初

悔不当初
huǐbùdāngchū
to regret one's past deeds (idiom)

CEDICT

to regret having done something

Wiktionary

事與願違而悔恨最初的計畫或作為不當。

重編國語辭典

Entry Composition

1 悔 huǐ (bound form) to regret; to repent
=2 不當 bùdàng unsuitable; improper; inappropriate
=2 不當 bùdāng
  1. (literary) does not match; does not equal
  2. (literary) is not
  3. (literary) should not
  4. does not match; does not equal
  5. is not
  6. should not
3 初 chū
  1. at first
  2. (at the) beginning
  3. first
  4. junior
  5. basic