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dumbfound

dumb·found [or] dum·found

dumbfound [or] dumfound

pronunciation:
duhm faUnd
part of speech: transitive verb
inflections: dumbfounded, dumbfounding, dumbfounds, dumfounded, dumfounding, dumfounds
definition: to confuse, amaze, or astonish.
The incredible talent of this small child dumbfounded the audience.The maze of narrow streets dumbfounded the tourists.
synonyms:
amaze, astonish, astound, bowl over, confuse, flabbergast
similar words:
befuddle, bewilder, floor, nonplus, numb, shock, stun, stupefy