DICT.TW Dictionary Taiwan

 Drowse v. i. [imp. & p. p. Drowsed p. pr. & vb. n. Drowsing.]  To sleep imperfectly or unsoundly; to slumber; to be heavy with sleepiness; to doze. “He drowsed upon his couch.”
    In the pool drowsed the cattle up to their knees.   --Lowell.