noun
1.A lack of energy and enthusiasm.
‘there was an air of lethargy about him’
‘The heat was swelling as the morning ticked on, filling the air with lethargy.’
2.A pathological state of sleepiness or deep unresponsiveness and inactivity.
‘a history of weight loss, lethargy, and fluid retention’
‘Some of the other side effects of the strong pain medications include confusion, lethargy and sleepiness.’
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