Lassitude
/ˈlæsɪtjuːd/
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Definition
(noun) Lethargy or lack of energy; fatigue, languor, listlessness
Sentence Examples
Counterintuitively, the cure for my lassitude was exercise.
We can't abandon our principles out of moral lassitude.
CEFR Practice Quiz
After a long and difficult week of work, he was overcome by a sense of deep ____ and just wanted to rest.