lethargy

Etymology

From Middle English litargie, from Medieval Latin litargia, from Late Latin lēthārgia, borrowed from Ancient Greek ληθᾱργῐ́ᾱ (lēthārgíā, “drowsiness”), from λήθᾱργος (lḗthārgos, “forgetful, lethargic”) + -ῐ́ᾱ (-íā, adjectival suffix).

noun

1. A state of extreme torpor or apathy, especially with lack of emotion, energy or enthusiasm; (loosely) sluggishness, laziness.
   Europe lay then under a deep lethargy. 1687, Francis Atterbury, An Answer to Some Considerations on the Spirit of Martin Luther and the Original of the Reformation at Oxford, page 42
   As already indicated, timekeeping is very poor. Point-to-point times are not kept, even with a clear road, and whilst fast running has never been a feature of the route because of the large number of junctions and speed restrictions, this Sunday night lethargy is hard to explain. 1959 March, D. Bertram, “An old friend - the 9.7”, in Trains Illustrated, page 141
   Yakovlev, one of the architects of the reforms put in place by Mikhail Gorbachev, says he too is "amazed" at the government's lethargy. 20 Mar 1995, Bruce W. Nelan, “Crime and Punishment”, in Time
   The increase in mining stocks helped the FTSE 100 shake off some earlier lethargy and close 9.8 points higher at 6270.8, despite the disappointment of unchanged UK interest rates. 9 May 2008, Nick Fletcher, “Lethargic FTSE lifted by hopes of mining move”, in The Guardian
2. (pathology) A condition characterized by extreme fatigue or drowsiness, deep unresponsiveness, or prolonged sleep patterns.
   This Apoplexie is (as I take it) a kind of Lethargie, a sleeping of the blood, a horson Tingling. c. 1599, William Shakespeare, King Henry IV, Part 2
   So in order to avoid unpleasant side effects like lethargy and sexual dysfunction, most recent trials also gave men testosterone supplements. 20 Oct 2003, Amanda Ripley, “At Last, the Pill for Men”, in Time