Brought to heel is an idiomatic expression that refers to the act of being compelled to obey and behave in a subservient or obedient manner. Some possible antonyms for this phrase could include assertive, independent, individualistic, self-directed, and self-reliant. These words reflect a sense of self-determination and resistance to being dominated or controlled by others. Rather than being brought to heel, individuals who embody these qualities are more likely to stand on their own two feet, think for themselves, and make their own decisions, even if it means going against the norm. In short, the antonyms for brought to heel suggest a rejection of conformity and a desire for autonomy.