n.磨擦, 磨損
attrition n.消磨,磨損 ( 通過磨擦作用擦掉或消耗掉 ) ;消耗【例】The long war of attrition exhausted the strength of both countries.這場長期的消耗戰耗盡了兩國的力量。【根】attrit磨擦→磨損。參︰contrition ( n.悔悟;後悔 )
a->去trit->摩擦ion->動詞結尾一直去摩擦久了=磨損
attrition a去+tri出力+tion -> 去出力,就會磨耗