Antonyms for the word "overarousal" include terms such as calmness, composure, relaxation, ease, serenity, tranquility, and peace. The opposite of being overaroused is feeling under-stimulated, which can also be described by synonyms such as boredom, inactivity, lethargy, dullness, and apathy. Finding balance between overarousal and under-stimulation is important for achieving an optimum level of arousal and maintaining emotional stability. Techniques such as deep breathing, mindfulness, exercise, and meditation can help regulate arousal levels and promote a sense of calm and relaxation in the body and mind.