Disannulling means nullification or cancellation of something. Some of the antonyms for disannulling can be affirmation, validation, approval, confirmation, ratification, and acceptance. When someone affirms or validates something, it is the opposite of disannulling. Similarly, approval or confirmation of something also means it is not being canceled or nullified. Ratification means formal acceptance and authorization. When something is accepted, it means it is not disannulled. All these words represent the opposite meaning of disannulling. Therefore, they can be used to express the positive outcome of a situation when disannulling is not necessary or applicable.