The antonyms for "wast cognizant of" include "ignorant," "unaware," "oblivious," and "clueless." When someone is ignorant, they lack knowledge about a particular subject or situation. Similarly, when someone is unaware or oblivious, they have no idea about what's going on around them. Being clueless means not knowing what to do or say in a particular situation. On the other hand, being cognizant means being aware or knowledgeable about something. It is essential to be cognizant of one's surroundings and situations. Aware individuals are better equipped to handle challenges and make the right decisions, while ignorant individuals tend to make mistakes and miss opportunities.