The phrase "in one power" implies a state of absolute control or authority. Antonyms for this phrase could include "out of control", "powerless", "dependent", or "submissive". Being out of control suggests a lack of power, where one is unable to influence or direct events in their desired direction. Powerlessness implies a condition of weakness or helplessness, where one has no control over their circumstances. Dependence suggests reliance on others for support or resources, while submissive implies a willingness to relinquish power or authority to another. These antonyms highlight the opposite qualities of in one power, which indicate a lack of control, autonomy, or self-determination.