1. In a perplexed manner
   "he looked at his professor perplexedly"
   - confoundedly

See also: perplexed

• inutile
• inutility
• invade
• invader
• invading
• invaginate
• invagination
• invalid
• invalidate
• invalidated
• invalidating
• invalidation
• invalidator
• invalidism
• invalidity
• invalidly
• invalidness
• invaluable
• invaluableness
• invaluably
• Invar
• invariability
• invariable
• invariableness
• invariably