verb (v)

• become ground down or deteriorate(verb.change)

  Example:
  Her confidence eroded.
  

  Synonym:
  eat at, gnaw, gnaw at, wear away
  

  source: wordnet30
• remove soil or rock(verb.change)

  Example:
  Rain eroded the terraces.
  

  Synonym:
  eat away, fret
  

  source: wordnet30
• To eat into or away; to corrode; as, canker erodes the flesh.(verb)

  source: webster1913
• To wear away; as, streams and glaciers erode the land.(verb)

  source: webster1913