The phrase "am cognizant of" means to be aware or conscious of something. Its antonyms would be "unaware," "ignorant," "uninformed," or "clueless." These words denote a lack of knowledge or understanding about a particular matter. Another antonym of "am cognizant of" would be "disregard," which means to ignore or pay no attention to something. Other antonyms may include "indifferent," "oblivious," "insensible," or "unresponsive." These words can indicate a lack of interest or concern in a particular issue. It is essential to know the opposite of "am cognizant of" to understand the full spectrum of meaning and context in communication.