The word "re-constituted" means to rebuild, reorganize, or reform something. Its antonyms, on the other hand, refer to the opposite of these actions. The first antonym for re-constituted is "dismantled," which means to take something apart or break it down into smaller pieces. Another antonym is "deconstructed," which means to examine or analyze something by breaking it down into its component parts. A third antonym is "disintegrated," which means to break apart or decay over time. Finally, "dissolved" is another antonym, meaning to break down or disperse completely in a liquid. These antonyms provide a range of different ideas and images to express the opposite of re-constituted.