Of or pertaining to hell; like hell; infernal; malignant; wicked; detestable; diabolical.
source: Webster 1913
adjective satellite
very unpleasant
Hellish weather. Stop that god-awful racket.
source: WordNet 3.0
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.
