at·tri·tion /əˈtrɪʃən, æ-/
 摩擦,磨損
 at·tri·tion /əˈtrɪʃən/ 名詞
 磨耗
 At·tri·tion n.
 1. The act of rubbing together; friction; the act of wearing by friction, or by rubbing substances together; abrasion.
    Effected by attrition of the inward stomach.   --Arbuthnot.
 2. The state of being worn.
 3. Theol. Grief for sin arising only from fear of punishment or feelings of shame. See Contrition.
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 attrition
      n 1: erosion by friction [syn: abrasion, corrasion, detrition]
      2: the wearing down of rock particles by friction due to water
         or wind or ice [syn: grinding, abrasion, detrition]
      3: sorrow for sin arising from fear of damnation [syn: contrition,
          contriteness]
      4: a wearing down to weaken or destroy; "a war of attrition"
      5: the act of rubbing together; wearing something down by
         friction