smirch in WordNet English dictionary

1. charge falsely or with malicious intent; attack the good name and reputation of someone
   "The journalists have defamed me!" "The article in the paper sullied my reputation"
   defame  slander  smirch  asperse  denigrate  calumniate  smear  sully  besmirch 
   
2. smear so as to make dirty or stained
   smirch  besmirch 
   

1. an act that brings discredit to the person who does it
   "he made a huge blot on his copybook"
   blot  smear  smirch  spot  stain 
   
2. a blemish made by dirt
   "he had a smudge on his cheek"
   smudge  spot  blot  daub  smear  smirch  slur