Deadtired refers to a state of extreme exhaustion and fatigue. Its antonyms would be words that describe the opposite of this feeling. Some of these words include rejuvenated, energized, refreshed, invigorated, lively, and vibrant. When you're feeling deadtired after a long day at work, you might need to engage in some activities that help you recharge, such as going for a walk, taking a nap or doing some exercise. Good nutrition and adequate rest can also help to keep you from feeling deadtired. By practicing self-care and adopting healthy habits, you can feel more rejuvenated and full of energy even after a long day.