铭心镂骨

銘心鏤骨
míngxīnlòugǔ
  1. engraved in one's heart and carved in one's bones (idiom); to remember a benefactor as long as one lives
  2. undying gratitude

CEDICT

比喻感激难忘。唐．柳宗元〈谢除柳州刺史表〉：「铭心镂骨，无报上天。」也作「刻骨铭心」。

重編國語辭典

Entry Composition

1 铭心 míngxīn
  1. (literary, figurative) to be engraved on one's heart; to never forget
  2. to be engraved on one's heart; to never forget
2 镂 lòu
  1. to engrave
  2. to carve
  3. hard steel
3 骨 gǔ bone

Related entries

没齿难忘 mòchǐnánwàng
  1. hard to forget even after one's teeth fall out (idiom); to remember a benefactor as long as one lives
  2. undying gratitude