Source : Webster's Revised Unabridged Dictionary (1913)

Grotesquely \Gro*tesque"ly\, adv.
   In a grotesque manner.

Source : WordNet®

grotesquely
     adv : in a grotesque manner; "behind the house lay two nude
           figures grotesquely bald, with deliberate knife-slashes
           marking their bodies" [syn: {monstrously}]