Synonyms of the word

lassitude

• n. Lethargy or lack of energy; fatigue.
• n. Listlessness or languor.

apathy

• n. Complete lack of emotion or motivation about a person, activity, or object; depression; lack of interest…

inanition

• n. Emptiness.
• n. (medicine) A state of advanced lack of adequate nutrition, food or water, or a physiological inability…
• n. (philosophy) A spiritual emptiness or lack of purpose or will to live, akin to the Existentialist Philosophy…

languor

• n. (uncountable) a state of the body or mind caused by exhaustion or disease and characterized by a languid…
• n. (countable) listless indolence; dreaminess.
• n. (uncountable) dullness, sluggishness; lack of vigor; stagnation.
• n. (obsolete, countable) An enfeebling disease; suffering.

lethargy

• n. (pathology) A condition characterized by extreme fatigue or drowsiness, or prolonged sleep patterns.
• n. A state of extreme torpor or apathy, especially with lack of emotion or interest; loosely, sluggishness,…

listlessness

• n. The state of being listless; apathetic indifference; lethargy.

slackness

• n. The state of being slack; the quality of having slack.

sluggishness

• n. The property of being sluggish, unable or unwilling to act quickly.
• n. The state of economic decline, inactivity, slow or subnormal growth.

torpidity

• n. The property of being torpid.

torpor

• n. A state of being inactive or stuporous.
• n. A state of apathy or lethargy.
• n. (biology) A state similar to hibernation characterised by energy-conserving, very deep sleep.

weakness

• n. (uncountable) The condition of being weak.
• n. (countable) An inadequate quality; fault.
• n. (countable) A special fondness or desire.