Shocking, 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.
Shades of meaning
Fernald has no entry of its own for shocking; he lists it under awful.
He lists it without comment; the entries above explain its neighbors.