Antonyms for the phrase "fixing upon" may include: releasing, letting go, discharging, unfocusing, loosening, relinquishing, and unfastening. These words describe a state of mind where one is no longer committed or bound to a particular choice or decision. Unlike fixing upon, these antonyms connote a lack of focus and direction, and often suggest a state of indecision or uncertainty. By using these antonyms, one can emphasize a sense of liberation, flexibility, or freedom, as opposed to the rigidity and certainty implied by the phrase "fixing upon". Together, these words offer a range of options to express the complexities of decision-making and the fluidity of change.