The word "perduring" means to last for a long time, and finding antonyms for this word might seem difficult. However, there are numerous words that convey the opposite meaning of "more perduring." Some antonyms that come to mind include "fleeting," "temporary," "ephemeral," "transient," and "inconstant." These words highlight the brevity or impermanence of something, such as a memory, feeling, or event. While perduring implies something enduring, long-lasting, or even eternal, its antonyms carry a sense of ephemerality, evanescence, or transience. By contrasting perduring with its antonyms, we can better understand what it means to endure and the value of things that stand the test of time.