The antonyms for the word "make sleepy" are numerous and varied. Some of the most common include "energize," "invigorate," "stimulate," "wake up," "excite," "activate," and "awaken." Other antonyms for "make sleepy" might include "arouse," "inspire," "enthuse," "motivate," "galvanize," and "spur on." These words all carry a sense of energy and movement, of stirring up or awakening something within us. Whether we are looking to combat drowsiness during the day or to stay alert and focused in a particular situation, the antonyms for "make sleepy" can help us to feel more alive and engaged with the world around us.