discredit

Synonyms: blow up bring into disrepute bring to naught censure defame degrade destroy disconsider disesteem disfavor disgrace dishonor disparage disprove explode exposé frown upon knock bottom out of mudsling poke full of holes pooh-pooh puncture put down reflect on reproach ruin run down shoot show up slander slur smear take rug out from under tear down vilify

Antonyms: commend credit honor praise

Synonyms: challenge deny disbelieve discount dispute distrust mistrust put under suspicion reject scoff at

Antonyms: believe credit trust