Both Uses

lethargic
in
Farewell to Manzanar
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In the government's eyes a free man now, he sat, like those black slaves you hear about who, when they got word of their freedom at the end of the Civil War, just did not know where else to go or what else to do and ended up back on the plantation, rooted there out of habit or lethargy or fear.†
Chpt 2.16

lethargy = lack of energy; or (often in historic literature) a state of sleep
He broke free of the lethargy that had nailed him to our steps for months.†
Chpt 2.19 *

Definitions:

(1) (lethargic)
lacking energy
(2) (meaning too rare to warrant focus)
More rarely, lethargy can refer to inactivity or even a state of unconsciousness.