Dis-affirms is a term used to indicate the negation or denial of a statement or belief. Its opposite, therefore, would be a word that signifies affirmation or agreement. Some of the antonyms for dis-affirms include terms like affirm, confirm, assert, validate, approve, agree, endorse, ratify, and support. These words are often used to express the opposite sentiment of dis-affirms and indicate the acceptance or agreement with a particular statement or belief. While dis-affirms suggest a negative connotation, antonyms like affirm and validate have a positive connotation and imply that a belief or statement is accurate and true.