一物降一物 [ㄧ ㄨˋ ㄒㄧㄤˊ ㄧ ㄨˋ; yi1 wu4 xiang2 yi1 wu4] lit. one object bests another object every item has a weakness (idiom) there is a rock to every scissor, a scissor to every paper, and a paper to every rock ◄ ►