对头 duìtóuduìtou compatible Origin Definitions Defs Strokes Stroke Words Sentences Sents 死对头 sǐduìtou arch-enemy an irreconcilable enemy or a lifelong foe不对头 bùduìtóu amiss suspicious, fishy, or abnormal in nature冤家对头 yuānjiāduìtóu arch-enemy a bitter enemy or long-standing opponent头对头 tóuduìtóu head-to-head (of clinical trials) head-to-head