Longman Dictionary of Contemporary English homepage

Date: 1600-1700
Language: Latin
Origin: somnus 'sleep'

insomnia

 noun
     
Related topics: Illness and Disability
in‧som‧ni‧a [uncountable]
MI if you suffer from insomnia, you are not able to sleep
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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