The term "re-vitalize" refers to the act of bringing back to life or renewing something. However, there are some antonyms for this word which signify the opposite meaning. One such antonym is "weaken," which means to make something less strong or effective. Another antonym is "destroy," which signifies completely breaking or ruining something. "Deteriorate" is another antonym that refers to the process of getting worse, usually gradually. "Depreciate" is another antonym, meaning to reduce the value or quality of something. Finally, "demolish," or completely wrecking something, is another antonym that signifies the opposite of revitalizing.