The phrase "made one's mind" refers to a decision that a person has made, indicating that they have come to a conclusion about something. The concept of making up one's mind implies a sense of finality, certainty, and commitment. The antonyms for "made one's mind" would thus be indecision, uncertainty, ambivalence, hesitation, vacillation, and wavering. When one has not made up their mind, they may be considering different options, evaluating pros and cons, or seeking additional information. In some cases, indecision may be a sign of a lack of confidence or fear of making the wrong choice.