The term "re-doubled" implies an act of intensifying or increasing something. Antonyms, on the other hand, are words that express the opposite meaning. Therefore, the antonyms for "re-doubled" would be those that convey ideas of decreasing, reducing, diminishing, or weakening. Some possible antonyms for "re-doubled" are halved, reduced, weakened, moderated, tempered, decreased, abated, lowered, lessened, and mitigated. These words indicate a decrease in quantity, force, intensity, or strength. Antonyms provide a useful tool for writers and speakers to convey a range of meanings and express nuances in language.