痛定思痛 [－－－－]

Jyutping tung3 ding6 si1 tung3
Pinyin tòng dìng sī tòng

Definitions (CC-CEDICT)
  1. to think of the pain when the pain is gone (idiom)
  2. to ponder about a painful experience
Definitions (粵典–words.hk)
  1. 動詞
    痛苦​過後回憶​返​，​汲取​教訓
    to draw a lesson from a bitter experience
Definitions (Wiktionary)
  1. phrase, idiomatic
    to recall one's painful experience after the sorrow has passed, often to learn a lesson from the bitter experience