Found 2 items, similar to lethargy.
English → English (WordNet)
Definition: lethargy
lethargy
n 1: a state of comatose torpor (as found in sleeping sickness)
[syn: 
lassitude, 
sluggishness]
2: weakness characterized by a lack of vitality or energy [syn:
inanition, 
lassitude]
3: inactivity; showing an unusual lack of energy [syn: 
languor,
sluggishness, 
phlegm]
English → English (gcide)
Definition: Lethargy
Lethargy 
\Leth"ar*gy\ (-j[y^]), n.; pl. 
-gies (-j[i^]z). [F.
l['e]thargie, 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]
Lethargy 
\Leth"ar*gy\, v. t.
To lethargize. [Obs.] --Shak.
[1913 Webster]