Webster’s Revised Unabridged Dictionary · 1913
Drowse
Drowse (drouz), v. i. [imp. & p. p. Drowsed; p. pr. & vb. n. Drowsing.] [AS. drūsian, drūsan, to sink, become slow or inactive; cf. OD. droosen to be sleepy, fall asleep, LG. drūsen, druusken, to slumber, fall down with a noise; prob, akin to AS. dreósan to fall. See Dreary.] To sleep imperfectly or unsoundly; to slumber; to be heavy with sleepiness; to doze. "He drowsed upon his couch." South.
In the pool drowsed the cattle up to their knees. Lowell.
Drowse, v. t. To make heavy with sleepiness or imperfect sleep; to make dull or stupid. Milton.
Drowse, n. A slight or imperfect sleep; a doze.
But smiled on in a drowse of ecstasy. Mrs. Browning.