Compendiary refers to something that is concise, condensed, or containing a lot of information in a brief manner. The antonyms for the word compendiary include verbose, long-winded, rambling, prolix, wordy, and repetitive. These terms represent the opposite of compendiary, which means to convey ideas in a concise and precise way. The use of antonyms can help to expand one's vocabulary and improve writing skills. When writing, it is important to use appropriate words that convey the desired tone and meaning. The use of antonyms can help writers to convey the opposite of a particular word and add depth and nuance to their writing.