What are the opposite words for languor?

Languor is typically used to describe a feeling of physical or mental weakness, weariness or lethargy. Antonyms for this word include vigor, energy, liveliness, and vitality. These words are often used to describe a sense of robustness, strength, and enthusiasm. Energy is the opposite of languor and denotes a sense of liveliness and dynamism. Conversely, languor can also be described in terms of mental states, and here, antonyms include alertness, acuity, and mental agility. Alertness represents a state of vigilance, attentiveness and readiness to act, which contrasts with the lethargy and slowness of languor.