ㄇㄧㄥˊmíngㄒㄧㄣxīnㄌㄡˋlòuㄍㄨˇ

  1. 比喻感激難忘·柳宗元刺史〉:銘心鏤骨上天。」刻骨銘心」。

engraved in one's heart and carved in one's bones (idiom)​; to remember a benefactor as long as one lives, undying gratitude