The term "prevailing against" refers to overcoming or winning against something or someone. Antonyms for this word can include terms like surrendering, losing, failing or yielding. When one succumbs to something, they give in or accept defeat. Similarly, losing and failing both signify a lack of success in a particular endeavor. One may also yield, which means to give way or submit to a particular pressure or force. Additionally, terms like struggling, fighting, and battling can also be considered as opposites of prevailing against, as they imply that the individual is not necessarily winning, but rather putting up a fight.