Meaning : Bewildering or striking dumb with wonder.
Synonyms : dumbfounding, dumfounding
Meaning : So surprisingly impressive as to stun or overwhelm.
							Example : 
							Such an enormous response was astonishing.
							An astounding achievement.
							The amount of money required was staggering.
							Suffered a staggering defeat.
							The figure inside the boucle dress was stupefying.
							
Synonyms : astonishing, staggering, stupefying