lethargy

Noun
  1. A state of comatose torpor (as found in sleeping sickness) (synset 114038461)
    is a type of: torpidity, torpor - a state of motor and mental inactivity with a partial suspension of sensibility
    subtypes: hebetude - mental lethargy or dullness
    same as: lassitude, sluggishness
  2. Weakness characterized by a lack of vitality or energy (synset 105049292)
    is a type of: weakness - the property of lacking physical or mental strength; liability to failure under pressure or stress or strain
    same as: inanition, lassitude, slackness
  3. Inactivity;
    Showing an unusual lack of energy (synset 104643310)
    "the general appearance of sluggishness alarmed his friends"
    is a type of: inactiveness, inactivity, inertia - a disposition to remain inactive or inert
    same as: flatness, languor, phlegm, sluggishness

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