Answer: astonish

AnswerCrossword Clue
ASTONISH

Dumbfound

ASTONISH

Stagger

ASTONISH

Amaze

ASTONISH
Surprise
ASTONISH
Knock for a loop
ASTONISHFloor
ASTONISHStun
ASTONISHBlow away
ASTONISHAmaze.
ASTONISHSurprise.
ASTONISHFill with sudden wonder
ASTONISHSurprise: author Morrison's sitting in tree (8)
ASTONISHFlabbergast
ASTONISHReally wow
ASTONISHBlow away, in a sense
ASTONISHStrike with surprise