dumbfound

or dum·found

[duhm-found, duhm-found]
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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

Synonyms for dumbfound

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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018


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British Dictionary definitions for dumbfounded

dumbfound

dumfound

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

Word Origin for dumbfound

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 dumbfounded
adj.

past participle adjective from dumbfound.

dumbfound

v.

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

Online Etymology Dictionary, © 2010 Douglas Harper