Synonyms of the word

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…

exhaustion

• n. The point of complete depletion, of the state of being used up.
• n. Supreme tiredness; having exhausted energy.
• n. (dated, chemistry) The removal (by percolation etc) of an active medicinal constituent from plant material.
• n. (dated, physics) The removal of all air from a vessel (the creation of a vacuum).
• n. (mathematics) An exhaustive procedure.

lassitude

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

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,…

slackness

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

weakness

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