Some common synonyms of lackadaisical are languid, languorous, listless, and spiritless. While all these words mean "lacking energy or enthusiasm," lackadaisical implies a carefree indifference marked by half-hearted efforts.

Why do I feel lacking in energy?

People may feel fatigued in body or mind (physical or psychological fatigue). Most of the time, fatigue can be traced to one or more of your habits or routines. Fatigue can be a normal and important response to physical exertion, poor eating habits, emotional stress, boredom, or lack of sleep.

What is a word for lacking energy?

The word lethargy describes inactivity or a lack of energy. ... Other lethargic nouns include torpor, sluggishness, and languor.