快かい Noun female given name or forename English jmdict 1 noun (common) (futsuumeishi) pleasure;delight;enjoyment 2 noun (common) (futsuumeishi) abbreviation rapid (train) See also: 快速 (かいそく), 快特 (かいとく) English jmnedict 1 Kai
快腸かいちょう Noun English jmdict 1 noun (common) (futsuumeishi) colloquial well-functioning bowels;good bowel movements