*HIATUS* Insomnia {c.h + l.h}

insomnia

/ɪnˈsɒmnɪə/

noun

habitual sleeplessness; inability to sleep.

synonyms: sleeplessness, wakefulness, restlessness;

Origin:

early 17th century: from Latin, from insomnis 'sleepless', from in- (expressing negation) + somnus 'sleep'.

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