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An inability to stay awake
Answer for the clue "An inability to stay awake ", 11 letters:
hypersomnia
Word definitions for hypersomnia in dictionaries
Wiktionary
Word definitions in Wiktionary
n. (context medicine pathology English) Excessive sleepiness.
Wikipedia
Word definitions in Wikipedia
In the 5th edition of the Diagnostic and Statistical Manual of Mental Disorders , published in May 2013, hypersomnia appears under sleep-wake disorders as hypersomnolence , of which there are several subtypes.
WordNet
Word definitions in WordNet
n. an inability to stay awake [ant: insomnia ]