insomniac

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insomniac /ɪnˈsɑːmniˌæk/ noun
plural insomniacs
insomniac
/ɪnˈsɑːmniˌæk/
noun
plural insomniacs
Learner's definition of INSOMNIAC
[count]
: a person who is not able to sleep : a person with insomnia
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