erosion

Noun
  • (geology) the mechanical process of wearing or grinding something down (as by particles washing over it) (synset 113496741)
  • Condition in which the earth's surface is worn away by the action of water and wind (synset 114542526)
  • A gradual decline of something (synset 113497147)
  • Erosion by chemical action (synset 113474601)

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