dumbfounded

dumfounded adjective as if struck dumb with astonishment and surprise; `a circle of policement stood dumbfounded by her denial of having seen the accident`; `the flabbergasted aldermen were speechless`; `was thunderstruck by the news of his promotion`...
Found on https://www.encyclo.co.uk/local/20974

dumbfounded

[adj] - as if struck dumb with astonishment and surprise
Found on http://www.webdictionary.co.uk/definition.php?query=dumbfounded
No exact match found