The word "sided with" refers to supporting or aligning with a particular person, group, or idea. Antonyms for this phrase would include words such as "opposed," "resisted," "objected," "disagreed," or "refused to support." When someone doesn't side with another, it could either mean they have a neutral stance or actively oppose the other party. It's important to understand different viewpoints and not immediately side with one without considering all the factors. By exploring opposing ideas and having a respectful discourse, we can learn and grow, and ultimately make informed decisions.