难忘 | nán wàng | unforgettable | |
刻骨铭心 | kè gǔ míng xīn | lit. carved in bones and engraved in the heart (idiom) / fig. etched in one's memory / unforgettable | |
没齿不忘 | mò chǐ bù wàng | lit. will not be forgotten even after one's teeth fall out / to remember as long as one lives / unforgettable (idiom) |