The antonyms for the word "most disunited" are "united," "harmonious," "cohesive," "congruent," and "integrated." When a group or community is united, they work together towards common goals and objectives, and there is a sense of solidarity and cooperation. A harmonious society is characterized by a peaceful coexistence of people, and there are no conflicts or divisions. A cohesive group is held together by a strong bond, and there is a shared sense of purpose and belonging. A congruent community is one where there is agreement and consistency of values and beliefs. An integrated society is one that embraces diversity and works towards equality and inclusion for all.