calumniate

v

1. slander, libel, impute, asperse, insinuate, traduce, falsify, accuse falsely, misrepresent, belie; injure, abuse, assail, stab, insult, backbite, Sl. badmouth, engage in personalities; slur, sully, defile, smear, smirch, besmirch, soil, blacken, taint, tarnish, attaint, blemish, smudge, stain, spot, brand, stigmatize, drag through the mud or mire, heap dirt upon, throw mud on, spatter, bespatter, Sl. dump on.

2. defame, denigrate, vituperate, vilify, vilipend, scandalize, run down, berate, revile, malign, impugn, gibbet, criticize, pull to pieces, Sl. do a hatchet job on, cut up, shred, give a bad name, speak ill of, speak evil of, hold up to scorn, sneer at, muckrake; belittle, detract, disparage, decry, deprecate, depreciate, derogate, devaluate, deflate; humiliate, humble, mortify, Sl. put down.