If you drowse, you are almost asleep or just asleep.
例句
Nina drowsed for a while.尼娜打了會盹。
英英詞典釋義
Adjective
1. 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"