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drowsy

adjective
 
 
/ˈdraʊ.zi/

Definition

being in a state between sleeping and being awake: The room is so warm it's making me feel drowsy.Tired and making tired drowsily
 
 
/-zɪ.li/ adverb
Tired and making tired
drowsiness
 
 
/-nəs/ noun [U]
Seasickness tablets often cause drowsiness.Tired and making tired
(Definition of drowsy adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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