Breviloquent is a term that denotes someone who has a mastery of using few words to express themselves. Its antonyms, on the other hand, are words that describe people who tend to ramble on and lack the ability to be concise in their conversations. Some examples of such antonyms include verbose, long-winded, loquacious, and garrulous. These terms not only indicate a lack of brevity but also suggest a tendency towards being overly talkative or extravagant in speech. Thus, while breviloquent connotes refinement and precision in language, its antonyms express the opposite quality of verbosity and wordiness.