-
dumbfounded
['dəmfaʊndɪd]
a circle of policement stood dumbfounded by her denial of having seen the accident
-
dumbstricken
-
dumbstruck
['dəˌmstrək]
-
dumfounded
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flabbergasted
['fɫæbɝˌgæstɪd]
the flabbergasted aldermen were speechless
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stupefied
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thunderstruck
['θəndɝˌstrək]
was thunderstruck by the news of his promotion