hellish

Adjective

• extremely evil or cruel; expressive of cruelty or befitting hell
  • something demonic in him--something that could be cruel
    
  • fires lit up a diabolic scene
    
  • diabolical sorcerers under the influence of devils
    
  • a fiendish despot
    
  • hellish torture
    
  • infernal instruments of war
    
  • satanic cruelty
    
  • unholy grimaces
    

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

Related words

• Synonyms: 
  demonic , diabolic , diabolical , fiendish , infernal , satanic , unholy , beastly , god-awful