Antonyms for high-spiritedness include lethargy, depression, apathy, dullness, and listlessness. When someone is not high-spirited, they may lack enthusiasm, energy, or excitement. They may be uninterested in doing anything, or they may feel unmotivated and lack the drive to achieve their goals. They may seem disengaged or unresponsive, and they may appear withdrawn or sad. In contrast to high-spiritedness, these antonyms suggest a more subdued or negative emotional state, and they may indicate a need for rest, recuperation, or professional support.