Verb besmirch has 2 senses
  1. defame, slander, smirch, asperse, denigrate, calumniate, smear, sully, besmirch - 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"
    --1 is one way to charge, accuse
    Sample sentences:
    Somebody ----s somebody
    Something ----s somebody
  2. smirch, besmirch - smear so as to make dirty or stained
    --2 is one way to smear
    Sample sentence:
    Somebody ----s something
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