Marcescible refers to something that tends to wither or decay, which means that its antonyms will be words that indicate growth, freshness, or liveliness. Some of the antonyms for marcescible are thriving, flourishing, blooming, evergreen, vigorous, animated, and alive. These words convey the opposite idea of something that is decaying or dying. Other antonyms of this word include persistent, durable, perennial, and enduring. These words describe things that are long-lasting and resistant to decay or withering. In contrast to marcescible, these antonyms evoke feelings of durability and vibrancy, which is a refreshing change from the concept of decay and deterioration.