drowsy, drowsing(a), dozy(adj)

half asleep

"made drowsy by the long ride"; "it seemed a pity to disturb the drowsing (or dozing) professor"; "a tired dozy child"; "the nodding (or napping) grandmother in her rocking chair"

drowsing(Noun)

The condition of being drowsy.

Drowsing(u)

of Drowse