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astound

a·stound [ ə stównd ] (past and past participle a·stound·ed, present participle a·stound·ing, 3rd person present singular a·stounds)


transitive verb 
Definition:
 
surprise somebody greatly: to overwhelm and stun somebody with sudden surprise
was astounded by the viciousness of the attacks

[14th century. Alteration of astoned, past participle of astone "stun," via Old French estoner< assumed Vulgar Latin extonare "thunder out"]

a·stound·ing adjective
a·stound·ing·ly adverb
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