hellish

(s) very unpleasant
- hellish weather
- stop that god-awful racket
beastly, god-awful,
(s) 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
demonic, fiendish, satanic, diabolic, diabolical, infernal, unholy,

beastly god-awful demonic fiendish satanic diabolic diabolical infernal unholy

hellion

hellishly