沒齒難忘 mò chǐ nán wàng

DEFINITIONS

  1. hard to forget even after one's teeth fall out (idiom); to remember a benefactor as long as one lives
  2. undying gratitude

CHARACTERS

沒 mò not, have not, none; to drown, sink
齒 chǐ teeth; gears, cogs; age; KangXi radical 211
難 nán difficult, arduous, hard; unable
忘 wàng
HSK 3
forget; neglect; miss, omit