lethargic

deficient in alertness or activity

Pertaining to, affected with, or resembling, lethargy; morbidly drowsy; dull; heavy.

Gk. lethargos, lazy

“Continue to preach them for the sake of the lethargic peace of which you speak? leave the church paralyzed, as I found it?" "Paralyzed!”

— Winston Churchill, Project Gutenberg Complete Works of Winston Churchill

“In rare cases, when Amur tigers prey on brown bears, they usually target young and sub-adult bears, besides small female adults taken outside their dens, generally when lethargic from hibernation.”