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insomnia

noun
🔊/ɪnˈsɒmniə/
🔊/ɪnˈsɑːmniə/
[uncountable]
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  1. the condition of being unable to sleep失眠（症）
    • to suffer from insomnia失眠
    see also sleeplessness
    Wordfinder
    Word Originearly 17th cent.: from Latin, from insomnis ‘sleepless’, from in- (expressing negation) + somnus ‘sleep’.