Source : Webster's Revised Unabridged Dictionary (1913)

Amazing \A*maz"ing\, a.
   Causing amazement; very wonderful; as, amazing grace. --
   {A*maz"ing*ly}, adv.

Source : WordNet®

amazingly
     adv : in an amazing manner; to everyone's surprise; "amazingly, he
           finished medical school in three years" [syn: {surprisingly},
            {astonishingly}]