The word "re-vivifying" means to restore life or vigor to something, but its antonyms can convey the opposite effect. Words like "dampening," "weakening," "destroying," and "killing" all describe actions that have the opposite effect of revivifying something. If you want to lower someone's spirits or energy, you might use these words in your speech or writing. However, be cautious of the impact your words might have. While antonyms are useful for describing contrasts, emphasizing negativity can be discouraging to someone's efforts or progress. Therefore, instead of using antonyms, it's often more effective to provide constructive feedback that supports growth and renewal.