meaning of hellish
1. Of or pertaining to hell; like hell; infernal; malignant; wicked; detestable; diabolical.
2. 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"