drowsyadjective
uk/ˈdraʊ.zi/us/ˈdraʊ.zi/being in a state between sleeping and being awake:
The room is so warm it's making me feel drowsy.
drowsily
adverb uk/ˈdraʊ.zəl.i/us/ˈdraʊ.zəl.i/
drowsiness
noun [ U ] uk/ˈdraʊ.zi.nəs/us/ˈdraʊ.zi.nəs/
Seasickness medication often causes drowsiness.