Being apprised of something means being informed or updated about a particular issue or situation. There are several antonyms for this phrase that convey the opposite meaning. One antonym is being kept in the dark, which means not being informed about something or not having knowledge of a particular situation. Another antonym is being uninformed, which means lacking knowledge or awareness about a specific matter. Ignorance is also an antonym for being apprised of, which means lacking knowledge or information about something. Conversely, being well-informed, knowledgeable, or aware are all synonyms for being apprised of something.