The term "excitedness" indicates a state of enthusiasm and eagerness. The opposite of excitedness can be termed as apathy, where one lacks interest or emotion. Another antonym for excitedness can be considered as boredom, which is a sense of feeling uninterested in the current activity or experience. The feeling of relaxedness, calmness, or serenity is also considered antonyms of excitedness. Moreover, melancholy, sadness, and depression can be opposite emotions for the feeling of excitedness. In simpler words, if excitedness is a state of being thrilled and stimulated, then its antonyms are emotions that indicate the lack of energy, disinterest, or low spirits.