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Lethargic

/ləˈθɑrdʒɪk/
C1
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(adj) Sluggish, slow.

I feel lethargic when I diet, what should I do?
The forum looks lethargic; maybe it's your diet.
CEFR Practice Quiz
After a very long and exhausting day at work, I felt quite ____ and just wanted to sleep for ten hours today.

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