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dumbfound

[duhm-found, duhm-found] /dʌmˈfaʊnd, ˈdʌmˌfaʊnd/
verb (used with object)
1.
to make speechless with amazement; astonish.
Also, dumbfounder.
Origin
1645-1655
1645-55; dumb + (con)found
Related forms
dumbfounderment, noun
Synonyms
amaze, confound, astound, stagger.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for dumbfound

dumbfound

/dʌmˈfaʊnd/
verb
1.
(transitive) to strike dumb with astonishment; amaze
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
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Word Origin and History for dumbfound
v.

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

Online Etymology Dictionary, © 2010 Douglas Harper
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