銘心刻骨 [铭－－－]

Jyutping ming5 sam1 hak1 gwat1
Pinyin míng xīn kè gǔ

Definitions (CC-CEDICT)
  1. lit. etched into one's heart and bones (idiom)
  2. fig. etched in one's memory; remembered with gratitude as long as one lives