Sluggishness can manifest in a variety of forms. Lethargy, torpor, listlessness, apathy, sloth, inertia, and languor are all synonyms for sluggardy. People who are feeling sluggish might describe themselves as being unmotivated, slow-moving, or lacking in energy. They might also say they are feeling weary, tired, or just plain lazy. Sluggishness can be the result of physical illness, lack of sleep, or poor diet and exercise habits. Mental health conditions such as depression and anxiety can also contribute to sluggishness. Whatever the cause, finding ways to boost energy and motivation is key to combatting sluggardy.