The phrase "most split" implies a high degree of division or separation. Antonyms for this phrase could include words such as "united," "connected," or "together." These words convey a sense of unity and wholeness, indicating that there is not a great amount of division between people or things. Other antonyms might include "agreement," "harmony," or "alliance." These words suggest that individuals or groups are working towards a common goal or purpose, rather than being divided or split apart. By using antonyms of "most split," we shift our focus towards cooperation and collaboration, rather than division and separation.