amaze, astonish, astound -- (affect with wonder; "Your ability to speak six languages amazes me!")
Overview of adj astonishing
The adj astonishing has 2 senses
amazing, astonishing -- (surprising greatly; "she does an amazing amount of work"; "the dog was capable of astonishing tricks")
astonishing, astounding, staggering, stupefying -- (so surprisingly impressive as to stun or overwhelm; "such an enormous response was astonishing"; "an astounding achievement"; "the amount of money required was staggering"; "suffered a staggering defeat"; "the figure inside the boucle dress was stupefying")