The antonyms for the word "being cognizant" include being unaware, ignorant, oblivious, unconscious, and inattentive. When one is not cognizant, they may lack the awareness or knowledge needed to understand the situation or make informed decisions. Being unaware means not having knowledge or consciousness of something, while being ignorant means lacking knowledge or information about a particular subject. Being oblivious refers to being unaware or forgetful, and being unconscious means lacking awareness or perception of one's surroundings. Lastly, being inattentive means not paying attention or being careless. All of these antonyms imply a lack of consciousness, awareness, or knowledge, which is the opposite of being cognizant.