Torpidness, the state of being dormant or sluggish, has several antonyms that describe a state of energy, vibrancy, and alertness. One such antonym is vitality, which means having great physical and mental energy. Another antonym is vigor, which implies physical strength and endurance. Alertness is another antonym for torpidness, indicating a state of being mentally quick and responsive. Briskness, quickness, and liveliness are other antonyms that suggest an active and energetic state. Conversely, lethargy, indolence, and slothfulness are synonyms for torpidness, indicating a lack of energy and activity. Overall, the antonyms for torpidness emphasize the importance of being energized, active, and alert in leading a fulfilling life.