The antonyms for "becomes conscious of" can vary, depending on the context and the specific meaning intended. Some possible antonyms might include "loses awareness of," "forgets," "ignores," "denies," or "suppresses." These words imply a lack of recognition or understanding of something, as opposed to becoming conscious of it. For example, if someone is purposely suppressing their emotions, they may be actively denying or ignoring their feelings, rather than becoming conscious of them. Similarly, if someone forgets a piece of information, they are no longer conscious of it and are instead experiencing a lack of awareness.