beastly

Adjective

• resembling a beast; showing lack of human sensibility
  • beastly desires
    
  • a bestial nature
    
  • brute force
    
  • a dull and brutish man
    
  • bestial treatment of prisoners
    

• very unpleasant
  • hellish weather
    
  • stop that god-awful racket
    

Adverb

• in a beastly manner
  • she behaved beastly toward her mother-in-law
    

Related words

• Synonyms: 
  bestial , brute(a) , brutish , brutal , hellish , god-awful