1. In a round form or manner; openly; plainly.

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

• countly,
• riendly,
• rounghly,
• roundys,
• rudly,
• foundly,
• roundt,
• foundle,
• roudly,
• ruedly,
• wroungly,
• resoundly,
• mountly,
• proundly,
• ronily,
• soundily,
• loundly,
• rongly,
• rounda,
• roundd

• rundle,
• rondel,
• roundelay,
• roundel.

The adjective form of the word "roundly" is "round".