Putrefiable is a word that describes something that is prone to decay or putrefaction. Its antonym would be a word that describes something that is resistant to decay or decomposition. Some possible antonyms for putrefiable include durable, long-lasting, stable, steady, solid, robust, and resilient. These words suggest strength, permanence, and the ability to withstand the effects of time and the elements. In contrast to putrefiable, they convey a sense of endurance and reliability, rather than decay and decay. As such, they are important qualities to consider when searching for materials that need to endure for a long time, such as buildings, bridges, and infrastructure.