1. To strike dumb; to confuse.

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

• dumnfound,
• dumbfound,
• dumfounde,
• sumfound,
• xumfound,
• cumfound,
• fumfound,
• rumfound,
• eumfound,
• dymfound,
• dhmfound,
• djmfound,
• dimfound,
• d8mfound,
• d7mfound,
• dumfond,
• dumfoud,
• Dampound,
• Dumofond,
• Domfound

The adjective form of the word "dumfound" is "dumfounded".

The plural form of the word "Dumfound" is "Dumfounds".

The singular form of the word "dumfound" remains the same, as it is an invariant or uncountable noun.