astounded

/AH0 S T AW1 N D IH0 D/
verb
  1. 1

    To astonish, bewilder or dazzle.

adjective
  1. 1

    Surprised, amazed, astonished or bewildered.

Source: https://en.wiktionary.org/wiki/astound, https://en.wiktionary.org/wiki/astounded