astound
https://gyazo.com/10eca15a562e5fa4cdc93b2b17c03cd0
source: [カーニバル・ファンタズムの弓塚さつきが指差して仰天するGIF画像｜無料GIF画像検索 GIFMAGAZINE 698371]
/icons/point.icon SURPRISE, ASTONISH, ASTOUND, AMAZE, FLABBERGAST mean to impress forcibly through unexpectedness.
SURPRISE stresses causing an effect through being unexpected but not necessarily unusual or novel.
e.g. surprised to find them at home
ASTONISH implies surprising so greatly as to seem incredible.
e.g. a discovery that astonished the world
ASTOUND stresses the shock of astonishment.
e.g. too astounded to respond
AMAZE suggests an effect of bewilderment.
e.g. amazed by the immense size of the place
FLABBERGAST may suggest thorough astonishment and bewilderment or dismay.
e.g. flabbergasted by his angry refusal
verb with object
shock or greatly surprise:
〈人〉をびっくり仰天させる, 愕然とさせる (!しばしば受け身で; astonish, amazeより意味が強い)
e.g. her bluntness astounded him.
ORIGIN
Middle English (as an adjective in the sense ‘stunned’): from astoned, past participle of obsolete astone (see astonish).