affront, asperse, be insolent, be rude, belittle, bemock, besmear, bespatter, blacken, blot, bring reproach upon, calumniate, cavil, censure, cheapen, condemn, contemn, criticize, debase, decry, defame, deflate, degrade, denigrate, depreciate, deride, derogate, detract, detrectare, discount, discredit, disesteem, disfavor, disgrace, dishonor, disregard, disrespect, downgrade, elevare, extenuare, find fault with, frown upon, gibe, humiliate, imitate insultingly, insult, jeer, lampoon, laugh at, look down on, lower the estimation of, make fun of, make light of, make sport of, malign, minimize, misprize, mock, play down, reflect poorly upon, ridicule, run down, scoff, scorn, shame, slander, slight, slur, smear, sneer, speak ill of, stain, stigmatize, sully, taint, tarnish, taunt, think little of, traduce, underrate, undervalue, vilify, vilipend
associated concepts: disparage a name, disparage a product
blame, brand (stigmatize), censure, complain (criticize), condemn (blame), condescend (patronize), contemn, criticize (find fault with), damage, debunk, decry, defame, demean (make lower), denounce (condemn), deprecate, depreciate, derogate, disapprove (condemn), discommend, discount (disbelieve), discredit, disdain, dishonor (deprive of honor), disoblige, fault, humiliate, impeach, jeer, lessen, libel, malign, minimize, misprize, mock (deride), pillory, remonstrate, reprimand, reproach, smear, spurn, sully, underestimate
Burton's Legal Thesaurus. William C. Burton. 2006
v. To make an untrue statement that harms the reputation of another's business or product.
Webster's New World Law Dictionary. Susan Ellis Wild. 2000.