- to make speechless with amazement; astonish.
Also dumb·found·er, dum·found·er.
Origin of dumbfound
SynonymsSee 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
- (tr) to strike dumb with astonishment; amaze
C17: from dumb + (con) found
Word Origin and History for dumbfound
Online Etymology Dictionary, © 2010 Douglas Harper