English to English

verb (v)

• charge falsely or with malicious intent; attack the good name and reputation of someone(verb.communication)

  Synonym:
  asperse, calumniate, defame, denigrate, slander, smear, smirch, sully
  

  source: wordnet30
• smear so as to make dirty or stained(verb.contact)

  Synonym:
  smirch
  

  source: wordnet30
• To smirch or soil; to discolor; to obscure. Hence: To dishonor; to sully.(verb)

  source: webster1913