• synonyms


or dum·found

[duhm-found, duhm-found]
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verb (used with object)
  1. to make speechless with amazement; astonish.
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Also dumb·found·er, dum·found·er.

Origin of dumbfound

First recorded in 1645–55; dumb + (con)found
Related formsdumb·found·er·ment, dum·found·er·ment, noun


See more synonyms for dumbfound on Thesaurus.com
amaze, confound, astound, stagger.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for dumbfound

Historical Examples

  • Dumbfound, to perplex, to beat soundly till not able to speak.

    The Slang Dictionary

    John Camden Hotten

  • He can show such familiarity with the Incas affairs as to dumbfound the old boy.

British Dictionary definitions for dumbfound



  1. (tr) to strike dumb with astonishment; amaze
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Word Origin

C17: from dumb + (con) found
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for dumbfound


1650s, from dumb (adj.) + ending from confound.

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Online Etymology Dictionary, © 2010 Douglas Harper