Besmirch
Part of speech: verb
Definition: To make dirty; to soil. To tarnish, especially someone's reputation; to debase.
Calumniate
Part of speech: verb
Definition: To make hurtful untrue comments about (someone)
Besmirch as a verb is to make dirty; to soil. while Calumniate as a verb is to make hurtful untrue comments about (someone)
Part of speech: verb
Definition: To make dirty; to soil. To tarnish, especially someone's reputation; to debase.
Part of speech: verb
Definition: To make hurtful untrue comments about (someone)
We hope you now know whether to use Besmirch or Calumniate in your sentence.