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English dictionary
Hint: In most browsers you can lookup any word by double click it.
English
noun
:
hypersomnia
1.
hypersomnia
(state)
an inability to stay awake
Broader (hypernym)
sleep disorder
Narrower (hyponym)
catalepsy
,
narcolepsy
Antonyms
insomnia
Based on WordNet 3.0 copyright © Princeton University.
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. English edition:
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