The antonyms for the phrase "having one way" could be interpreted as having multiple options or pathways. Some potential antonyms might include "flexible," "adaptable," "versatile," "multifaceted," "diverse," or "varied." These terms all suggest a willingness or ability to explore different approaches, consider alternate possibilities, or accommodate different perspectives. The opposite of having one way might also be described as being open-minded, creative, resourceful, or innovative. By contrast, a person or situation that is characterized by rigidity, narrow-mindedness, or inflexibility could be seen as an antonym for having one way.