lethargic

"Lethargic" describes a lack of energy or interest. It can also be used figuratively, such as describing a sluggish economy. The word originates from the Greek myth of the River Lethe, whose waters caused forgetfulness and indifference. Lethargic individuals may feel sluggish, inactive, or apathetic. The term "lethargy" refers to the noun form of the adjective. The word's etymology is rooted in the Greek word "lēthē," meaning "forgetfulness." The myth and the word's origin suggest a connection between forgetfulness and feelings of sluggishness.