astounding

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

    To astonish, bewilder or dazzle.

adjective
  1. 1

    That astounds or astound.

    โ€œastounding success; an astounding spectacleโ€

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