Source : Webster's Revised Unabridged Dictionary (1913)

Shocking \Shock"ing\, a.
   Causing to shake or tremble, as by a blow; especially,
   causing to recoil with horror or disgust; extremely offensive
   or disgusting.

         The grossest and most shocking villainies. --Secker.
   -- {Shock"ing*ly}, adv. -- {Shock"ing*ness}, n.

Source : WordNet®

shockingly
     adv : in a shocking manner or to a shocking degree; "teachers were
           shockingly underpaid"