The word "fossilizes" means to become fixed and incapable of change or development. Its antonyms are words that describe the opposite, such as revitalizes, rejuvenates, enlivens, stimulates, and activates. If something is revitalized, it becomes new again and full of life. When something rejuvenates, it is restored to its former state of youthfulness and vigor. Enlivening something involves making it more interesting or exciting. Stimulating something means to awaken or arouse a response or reaction. Finally, activating something involves initiating or setting it into motion. These antonyms represent the opposite of fossilizing, which is to keep something moving, thriving, and evolving.