Ex-citations are forms of excitement that have diminished over time or lost their appeal altogether. There are several apt antonyms to this word, depending on the context. For instance, the antonym of ex-citations in emotional terms is "apathy," which is a lack of interest or enthusiasm for something. If we consider ex-citations in academic settings, "boredom" is an antonym that perfectly fits, conveying disinterest or a lack of engagement in scholarly activities. In general, antonyms for ex-citations could include indifference, monotony, disinterest, tedium, or ennui. All of these words describe the absence of excitement, engagement, and interest that characterize ex-citations.