1. (

• beastly ,
• hellish ,
• god-awful

) (informal) very unpleasant; "hellish weather"; "stop that god-awful racket" ;

2. (

• demonic ,
• diabolic ,
• diabolical ,
• fiendish ,
• hellish ,
• infernal ,
• satanic ,
• unholy

) extremely evil or cruel; expressive of cruelty or befitting hell; "something demonic in him;