One word riddle

[Bob Molloy]

Can you think of a nine letter English word that can have letters removed one at a time while still remaining a word, right down to the last letter?
Hint: it is synonymous with "astonishing".

[Ricky Barron (RIP)]

Startling
Starting
Staring
String
Sting
sing
sin
In
I

[Bob Molloy]

Good one, Ricky. Go to the top of the class. Do you have any other one word riddles?

[Mike Stenson (RIP)]

splittings
splitting
slitting
sitting
siting
sting
sing
sin
in
i