When something is disappointing, it falls short of our expectations and leaves us feeling unsatisfied. The opposite of disappointing is to be satisfying, fulfilling, or gratifying. When something fulfills our expectations, we feel pleased, content, and gratified. So, it's safe to say that satisfying, fulfilling, and gratifying are the antonyms of disappointing. Conversely, when something is disappointing, it's also disheartening, discouraging, or demoralizing. The antonyms of these emotions are encouraging, inspiring, and uplifting. So, when life disappoints us, it's up to us to find ways to feel satisfied, contented and inspired, and to overcome any negative feelings that come our way.