The phrase "sends sleep" refers to actions or situations that induce sleepiness or a feeling of calmness. Its antonyms, or opposites, refer to activities or circumstances that stimulate wakefulness, energy, and excitement. Examples of antonyms for "sends sleep" include activities like exercising, socializing, and engaging in challenging or stimulating mental activities. Listening to loud music, watching action-packed movies, and drinking caffeine also have the opposite effect of "sending sleep." Other antonyms include stressful situations, anxiety-inducing events, and activities that require focus, attention, and concentration. Overall, the antonyms for "sends sleep" refer to actions and events that keep us alert and active rather than inducing drowsiness or lethargy.