The antonyms for the word "de-cays" refer to the opposite concept of decay or deterioration, implying growth, improvement, preservation or conservation. Words like develop, grow, thrive, flourish, progress, enhance, maintain, repair, and rejuvenate, represent antonyms for de-cays. These terms are used to describe the opposite of the natural degradation process of organic matter, giving the idea of revival, construction or advancement. For example, a thriving ecosystem with growing diversity is the antithesis of environmental decay. Thus, antonyms of de-cays point out to a positive or constructive context, emphasizing the possibility of progress, restoration or development.