“刻骨铭心”，汉语成语，字面意思是“imprint on the bones and inscribe 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 engraved in/on one's mind/memory”等。

例句：

你是否曾经历过刻骨铭心的爱？

Have you ever experienced an unforgettable love story?

刻骨铭心之言

Words which make an indelible impression/Indelible words