degrade, stain, compromise, scar, blot, damage, outsource, commodify, devalue, shame, disparage, debase, disfigure, deface, demean, humiliate, reduce to, dishonor, blemish, cheapen, prostitute, objectify, commoditize, mass-produce

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

downgrade, rank, demote, relegate, devalue, depreciate, deflate, demean, undervalue, cheapen, reduce in rank, lower (status), bump down, declass, move down

knock, brush aside, slough off, overlook, ignore, disregard, ditch, gloss over, abandon, condescend, devalue, deflate, disparage, diminish, trivialize, dismiss, discredit, put down, shrug off, belittle, denigrate, badmouth, poke holes in, sell short, downplay, treat lightly, detract from, skip over, dis, reduce to, pass over, pooh-pooh, forget, pay no heed to, make light of, sneeze at, take no notice of, discount (as unworthy of consideration), miss the point