as·tound·ed
ə-ˈstau̇n-dəd
: feeling or showing great surprise or wonder : astonished entry 1, amazed entry 1
was astounded to hear the news
We were too astounded to speak. We could only stand there staring in amazement.—Arthur Conan Doyle
astounded
2 of 2past tense and past participle of astound entry 1
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Merriam-Webster unabridged



