- of, relating to, or affected with lethargy; drowsy; sluggish; apathetic.
- producing lethargy: The lethargic heat and humidity of the day made me want to do nothing but nap.
Origin of lethargic
SynonymsSee more synonyms for lethargic on Thesaurus.com
1. lazy, indolent, torpid.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Word Origin and History for lethargical
late 14c., litargik, from Latin lethargicus "affected with lethargy," from Greek lethargikos, from lethargos (see lethargy). Related: Lethargically.
Online Etymology Dictionary, © 2010 Douglas Harper