(n) inactivity; showing an unusual lack of energy, Syn. phlegm, sluggishness, lethargy, flatness, Example:the general appearance of sluggishness alarmed his friends
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
n.; pl.-gies [ F. léthargie, L. lethargia, Gr. lhqargi`a, fr. lh`qargos forgetful, fr. lh`qh forgetfulness. See Lethe. ] 1. Morbid drowsiness; continued or profound sleep, from which a person can scarcely be awaked. [ 1913 Webster ]
2. A state of inaction or indifference. [ 1913 Webster ]
Europe lay then under a deep lethargy. Atterbury. [ 1913 Webster ]