回火 huí huǒ

DEFINITIONS

  1. to temper (iron)
  2. to flare back
  3. flareback (in a gas burner)
  4. (of an engine) to backfire

CHARACTERS

回 huí
HSK 1
return, turn around; a time
火 huǒ
HSK 2
fire, flame; burn; anger, rage