黑化

hēihuà
  1. to blacken
  2. (slang) to undergo a transformation to a malevolent personality (often, precipitated by intense psychological stress)

CEDICT

slang

Entry Composition

1 黑 hēi
  1. black
  2. dark
  3. sinister
  4. secret
  5. shady
  6. illegal
  7. to hide (sth) away
  8. to vilify
  9. (loanword) to hack (computing)
2 化 huà
  1. to make into
  2. to change into
  3. -ization
  4. to ... -ize
  5. to transform
  6. abbr. for 化学 huàxué