The antonyms for the word "more persisting" are "less committed," "fickle," and "inconstant." If someone is less committed, they may not have the same level of determination or dedication as someone who is persisting more. Fickle individuals may change their minds frequently, making it difficult for them to stick to a particular task or goal. Inconstant people lack consistency, showing irregularity in their behavior, which can prevent them from persisting in any one thing. Therefore, antonyms of "more persisting" can describe people who (1) lack motivation, (2) are unreliable, or (3) demonstrate inconsistency in their actions.