attrition

Noun
  1. Erosion by friction (synset 113444788)
  2. The wearing down of rock particles by friction due to water or wind or ice (synset 111480462)
  3. Sorrow for sin arising from fear of damnation (synset 107550088)
  4. A wearing down to weaken or destroy (synset 107371570)
    "a war of attrition"
  5. The act of rubbing together;
    Wearing something down by friction (synset 100362621)

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