The antonyms for the term "most apart" would be "closest together" or "closest." These words suggest a state of proximity and togetherness, which is the opposite of being apart. They imply an interconnectedness or a sense of unity between two or more entities. Other antonyms may include "united," "connected," or "integrated." These words suggest a sense of belonging or being part of a larger whole. The antonyms for "most apart" can be useful when describing relationships, communities, or even physical objects that are closely connected or integrated.