Antonyms for the word "most predominate" include "least significant," "least dominant," "minor," "insignificant," "trivial," "unimportant," and "inconsequential." These words suggest that something or someone is not the most important or dominant factor in a particular situation, but rather holds a lesser or minimal role. For example, in a group discussion, one idea may be the most predominate, while the other ideas may be considered insignificant. In this case, the antonym "least significant" could be used to describe the other ideas that are not as dominant.