The antonyms for the phrase "grows tired" can be "rejuvenated," "refreshed," "revitalized," "energized," "restored," "invigorated," and "recharged." These words depict a sense of renewed energy and strength. When someone is no longer exhausted, they feel active and alert, ready to tackle any obstacle that comes their way. These antonyms are significant in describing the opposite of being fatigued, tired, or burned out. They serve as a reminder that taking a break or a moment to revitalize oneself is crucial for physical and mental well-being, and that there is always a chance to feel alive and energized again.