The opposite of "more uncomplimentary" can be described by several antonyms such as complimentary, flattering, and admiring. These antonyms refer to the opposite of negative feedback, which is positive feedback or praise. Other antonyms for "more uncomplimentary" include laudatory, praiseful, and applauding, which all indicate appreciation or admiration. Similarly, the antonyms approving, approvingly, and acclamatory illustrate agreement and acceptance. In summary, the antonyms for "more uncomplimentary" describe the positive or favorable words used to hearten or acknowledge a person's actions or personality.