[御敌 / 禦敵, yù dí, ㄩˋ ㄉㄧˊ]armed enemy of the nation; enemy of the Emperor; fig. championship challenger; contender opposing champion in sporting contest#66379[Add to Longdo]
[かえりうち, kaeriuchi](n) (1) killing a would-be avenger; (2) having the tables turned on someone (e.g. by a challenger); being beaten at one's own game#18610[Add to Longdo]