[没齿难忘 / 沒齒難忘, mò chǐ nán wàngㄇㄛˋ ㄔˇ ㄋㄢˊ ㄨㄤˋ] hard to forget even after one's teeth fall out (成语 saw); to remember a benefactor as long as one lives; undying gratitude#103893
[没齿不忘 / 沒齒不忘, mò chǐ bù wàngㄇㄛˋ ㄔˇ ㄅㄨˋ ㄨㄤˋ] hard to forget even after one's teeth fall out (成语 saw); to remember a benefactor as long as one lives; undying gratitude#180616
[おもいしらす, omoishirasu] (v5s) (See 思い知らせる) to teach somebody a lesson; to have a revenge on; to get even with; to make someone realize; to make someone realise