dumbfound

[duhm-found, duhm-found]
verb (used with object)
to make speechless with amazement; astonish.
Also, dumbfounder.


Origin:
1645–55; dumb + (con)found

dumbfounderment, noun


amaze, confound, astound, stagger.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
dumbfound or dumfound (dʌmˈfaʊnd)
 
vb
(tr) to strike dumb with astonishment; amaze
 
[C17: from dumb + (con)found]
 
dumfound or dumfound
 
vb
 
[C17: from dumb + (con)found]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

dumbfound
1650s, from dumb (q.v.) + (con)found.

dumbfounded
pp. adj. from dumbfound.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
He was dumbfounded: his annual profits were never more than about $20000.
That leaves us dumbfounded.
However, I would have been dumbfounded and not asked good questions.
Other guests seemed dumbfounded by the sight of the dealers.
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