The antonym of "unabridged" is "abridged," which means shortened or condensed. Abridged books, movies, or speeches contain only the essential parts, while omitting the rest. This can be beneficial in certain situations, such as when time is limited or when the audience needs a quick overview. However, abridgment can also result in the loss of nuance, depth, and context. The antonym of "unabridged" also implies completion or wholeness, which is conveyed by words like "full," "complete," or "unexpurgated." These terms indicate that nothing has been left out or altered, and that the original content is presented in its entirety.