In what situation would a person be described as 'lethargic'?

A person described as 'lethargic' typically exhibits a state of sluggishness or a significant reduction in energy levels, which often includes difficulty in arousal or responding to stimuli. This state can be associated with a variety of medical conditions, fatigue, or emotional disturbances. Lethargy involves an overall lack of alertness, making it hard for individuals to stay awake or attentive.

In contrast, the other scenarios describe various states of high energy or alertness, making them unsuitable descriptions for lethargy. When someone feels energetic and alert, is exhibiting quick movements, or is showing enthusiasm, they are demonstrating the opposite of lethargic behavior. Such traits highlight engagement and vitality rather than the reduced responsiveness and energy characteristic of lethargy.