1. A state of comatose torpor (as found in sleeping sickness)
   - lassitude, sluggishness 
2. Weakness characterized by a lack of vitality or energy
   - inanition, lassitude, slackness 
3. Inactivity; showing an unusual lack of energy
   - languor, sluggishness, phlegm, flatness

Derived forms: lethargies

See also: lethargic

Type of: inactiveness, inactivity, inertia, torpidity, torpor, weakness

Encyclopedia: Lethargy

• inseam
• insect
• insect bite
• insect powder
• insect repellant
• insect repellent
• Insecta
• insectan
• insecticidal
• insecticidally
• insecticide
• insectifuge
• insectile
• Insectivora
• insectivore
• insectivorous
• insecure
• insecurely
• insecureness
• insecurity
• inseminate
• insemination
• insensate
• insensately
• insensibility