/ əˈstɒnɪʃ; NAmE əˈstɑːn-/ verb
to surprise sb very much
SYN amaze ➡ note at surprise :
[ vn ]
The news astonished everyone.
She astonished us by saying she was leaving.
[ vn ( that )]
It astonishes me (that) he could be so thoughtless.
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WORD ORIGIN
early 16th cent. (as astonished , in the sense stunned, bewildered, dismayed ): from obsolete astone stun, stupefy , from Old French estoner , based on Latin ex- out + tonare to thunder.