1. In a dull drowsy manner.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• drowsey,
• drousily,
• drowzily,
• srowsily,
• xrowsily,
• crowsily,
• frowsily,
• rrowsily,
• erowsily,
• drossily,
• drowssily,
• drosily,
• drowsly,
• drowsilly,
• drowsyly,
• dresily,
• ferousily,
• Drousila,
• drowsilys,
• drowsley

• Drusilla,
• drowsier,
• drowsy.

The adjective form of the word "drowsily" is "drowsy".