Antonyms of verb affirm

1 of 3 senses of affirm

Sense 1
confirm, corroborate, sustain, substantiate, support, affirm -- (establish or strengthen as with new evidence or facts; "his story confirmed my doubts"; "The evidence supports the defendant")
       Antonym of negate (Sense 3)
      => negate, contradict -- (prove negative; show to be false)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb affirm

3 senses of affirm

Sense 1
confirm, corroborate, sustain, substantiate, support, affirm -- (establish or strengthen as with new evidence or facts; "his story confirmed my doubts"; "The evidence supports the defendant")

Sense 2
affirm, verify, assert, avow, aver, swan, swear -- (to declare or affirm solemnly and formally as true; "Before God I swear I am innocent")
       => declare -- (state emphatically and authoritatively; "He declared that he needed more money to carry out the task he was charged with")

Sense 3
affirm -- (say yes to)