listless

This term describes a state of profound apathy or lethargy that goes beyond simple tiredness. It suggests a vacuum of motivation where the individual is not necessarily sad or depressed, but rather devoid of the internal spark required to initiate action or feel interest.

In a clinical or physical sense, it often characterizes the weakness associated with illness or extreme exhaustion. When used socially, it conveys a sense of boredom or spiritual emptiness, often appearing in descriptions of oppressive heat or monotonous environments where time seems to stretch and lose meaning.