Depreciate

disparage belittle deride ridicule denigrate minimize discredit underrate deprecate put down slight condemn attack criticize censure humble disgrace defame slander vilify malign traduce asperse calumniate revile scorn sneer at scoff at contemn discount discountenance detract lower degrade smear rap roast slam knock find fault with fault clamor against take down a peg run down undervalue look down on dispraise