beastly in WordNet English dictionary

1. in a beastly manner
   "she behaved beastly toward her mother-in-law"
   beastly  beastly 
   

1. resembling a beast; showing lack of human sensibility
   "beastly desires"; "a bestial nature"; "brute force"; "a dull and brutish man"; "bestial treatment of prisoners"
   beastly  bestial  brute  brutish  brutal 
   
2. very unpleasant
   "hellish weather"; "stop that god-awful racket"
   beastly  hellish  god-awful