The prefix "ex-" typically signifies former, no longer, or outside of. However, it also has several antonyms, including "in," "pro," "en," and "hyper." "In-" is the opposite of "ex-" because it implies inside or within, such as "inclusion" versus "exclusion." "Pro-" means for or in favor of, so "ex-" would stand for against or opposed. "En-" refers to the starting point of a process, while "ex-" represents the endpoint. Finally, "hyper-" is the antonym of "ex-" because it means excessive or beyond, while "ex-" means former or outside of something. Knowing the antonyms of "ex-" can help deepen our understanding of words and their prefixes.