astonishing
astonish + -ing
https://gyazo.com/a177506fc420cedea0f9f9e4be3abe6a
source: JoJo - Yes I Am ! ［HD］ on Make a GIF
adjective
extremely surprising or impressive; amazing:
(その意外性により)〈事･人･物が〉〈人〉を非常に驚かす, 仰天させる(amaze); 〖it ～es A that節〗 …ということがA〈人〉を仰天させる
e.g. an astonishing achievement
e.g. I find it astonishing that they ever thought it could work.