Ideographic: An insect 虫 changing 兑 its skin; 兑 also provides the pronunciationRadical:

meaning for tuì:

  • - skin cast off during molting
  • - exuvia
  • - to pupate
  • - to molt
  • - to slough
  • - to cast off an old skin or shellto transform
  • - to morph
  • - to degenerate
  • - metamorphosis
  • - transmutation
  • - transformation
  • - decay
  • - degeneration(of insects) to undergo metamorphosis
  • - (fig.) to be transformed
  • - to metamorphose
  • - to become degradedskin cast off during molting
  • - exuvium
  • - to pupate
  • - to molt
  • - to slough
  • - to cast off an old skin or shellcicada slough
  • - fig. to free oneself
  • - to extricate oneself fromto degenerate (morally) (idiom)
  • - to become depraved