There are no antonyms for the word "re-duplicates" because it is not an established word in the English language. "Duplicate," on the other hand, has several antonyms such as "destroy", "disintegrate", "eliminate", "erase", "obliterate", "rid", "unmake", and "wipe out". These words refer to acts of undoing or eliminating the presence of a duplicate or replicating object. Therefore, if you are looking for the antonyms of "re-duplicates," you may need to consider alternative words such as "removes," "clears," or "eradicates" that mean to eliminate or reduce duplicates.