Search the dictionary A Chinese word or character, or English Draw a character Search 7 entries. bìyào 必要 necessary bùbìyào 不必要 needless bìyàotiáojiàn 必要条件 requirement bìyàotiáojiàn 必要條件 requirement bìyàoxìng 必要性 necessity fēibìyào 非必要 inessential bágēnhànmáobǐyāocū 拔根汗毛比腰粗 lit. a hair plucked from (person A) would be thicker than (person B)'s waist (idiom)