The antonyms for the phrase "wert apprised of" are numerous and varied, depending on the context within which it is used. Some possible antonyms might include "weren't informed of," "didn't know about," "had no knowledge of," or "remained oblivious to." Other antonyms might include "misinformed about," "uninformed about," or "kept in the dark about." Ultimately, the choice of antonym will depend on the specific situation or circumstance in which the phrase is used, as well as the speaker or writer's intended meaning or emphasis. Regardless of the antonym chosen, the opposite of being apprised of something is likely to entail a lack of awareness, understanding, or knowledge.