- 没齿难忘 mòchǐnánwàng to remember forever(idiom) hard to forget even after one's teeth fall out; to remember for the rest of one's life or feel undying gratitude towards a benefactor
- 没齿不忘 mòchǐbùwàng to remember foreverto remember for the rest of one's life; literally "will not be forgotten even after one's teeth fall out"