lethargic

Meanings

1. 1
   adj

   deficient in alertness or activity

   bullfrogs became lethargic with the first cold nights

2. 2
   adj

   Sluggish, slow.

   [That cat] hasn't caught a mouse since he was a slip of a kitten. Except when eating, he does nothing but sleep. Lethargic is the word that springs to the lips. If you cast an eye on him, you will see that he's asleep now.

3. 3
   adj

   Indifferent, apathetic.

Etymology

Learned borrowing from Ancient Greek ληθαργικός (lēthargikós), from λήθαργος (lḗthargos, “forgetful, lethargic”), from λήθη (lḗthē, “a forgetting, forgetfulness”) (from which Lethe (“river in Hades”)) + ἀργός (argós, “not working”). By surface analysis, lethargy + -ic.