To astonish and bewilder. See Synonyms at surprise.(verb-transitive)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "astound" in a sentence
"The depths of his cleverness continue to astound me."
"It will astound you with revelations about our culture and its ecosystem."
"The most recent book to surprise and astound me was In the Courts of the Sun by B. D'Amato."