刻骨铭心，汉语成语，字面意思是imprint on the bones and inscribe1 on the memory，形容留下的印象极其深刻，永远忘不了。可以翻译为be engraved2 in/on ones mind/memory等。
例句：
你是不是过去历过刻骨铭心的爱？
Have you ever experienced an unforgettable love story?
刻骨铭心之言
Words which make an indelible impression/Indelible words