The term "most negotiated" implies a situation in which an agreement is reached through compromise and discussion between parties. In contrast, the antonyms for "most negotiated" could be words such as "unilateral," "imposed," or "dictated." These words would suggest that the decision or agreement is made by one party, without input or consideration from others. Other possible antonyms for "most negotiated" might include "uncompromising," "unyielding," or "rigid," suggesting a situation in which one or more parties refuse to budge or consider alternative perspectives. Ultimately, the antonyms for "most negotiated" suggest a lack of collaboration, compromise, and mutual respect in reaching an agreement.