The word "putrescing" means to decay or undergo decomposition. Some antonyms for this term could be words like fresh, alive, healthy, intact, and pristine. These words convey a sense of vitality and freshness, rather than the decay and decomposition implied by putrescing. Other antonyms could include words like rejuvenated, renewed, invigorated, and revitalized, which all suggest a process of restoration and renewal rather than decay. Such antonyms can be used to describe living things such as fruits and vegetables, as well as inanimate objects like buildings or art pieces that are still in good condition.