degrade, libel, slander, invalidate, censor, damage, doubt, dispute, discount, devalue, depreciate, deflate, call into question, diminish, smear, pronounce, discredit, blame, belittle, denigrate, poke holes in, reduce to, question (the validity of), disprove, refute, explode (a myth), damage (a reputation), cast in a negative light, cast doubt on, reproach, pin blame on, investigate (the value), depict (in a negative light), deride, tear apart, inveigh against
brush aside, shrug, wave, degrade, tear down, mock, overlook, ignore, disregard, tease, cast off, gloss over, dare, invalidate, reject, spurn, demoralize, marginalize, chastise, condescend, discount, patronize, snub, turn on/against, decry, disparage, ridicule, insult, revile, smear, rebuff, repudiate, pronounce, trivialize, joke, demean, humiliate, ostracize, dismiss, pity, feel sorry for, look down on, discredit, put down, belittle, denigrate, deride, embolden, grin, smirk, scorn, sneer, snicker, snigger, taunt, infantilize, castigate, slight, scoff at, shun, snort at, amuse oneself (at someone's expense), laugh at, toss aside/out, refuse (to engage), jilt, disdain, treat with contempt, cold shoulder, parody, speak down to, knock down a rung (on the social ladder), savage