Dis-affirming means to deny or contradict something that has been previously asserted. Antonyms for dis-affirming include affirming, agreeing, accepting, acknowledging, admitting, confirming, endorsing, ratifying, supporting, and validating. When we affirm something, we attest to its truthfulness or validity. We accept it as a fact or acknowledge its existence. When we ratify something, we give it our official approval or consent. To validate something is to confirm its worthiness or accuracy. Therefore, using antonyms for dis-affirming can help us communicate agreement, acceptance, and validation towards an idea or assertion.