The term "most uniting" implies something that brings people together and promotes harmony. Therefore, antonyms for this phrase would be words that indicate divisiveness, discord, or isolation. Some antonyms for "most uniting" could include divisive, estranging, isolating, polarizing, segregating, or fragmenting. These words suggest a lack of unity and cooperation, highlighting the negative impacts of disunity and conflict. By considering these opposing terms, we can gain a deeper understanding of the power and importance of unity, and the need to overcome division and differences in order to work together towards common goals.