unholy
1. [ adjective ] extremely evil or cruel; expressive of cruelty or befitting hell
Synonyms: infernal satanic fiendish hellish diabolic diabolical demonic
Examples:

"something demonic in him" "fires lit up a diabolic scene" "a fiendish despot" "hellish torture" "infernal instruments of war" "satanic cruelty" "unholy grimaces"

Related terms: evil
2. [ adjective ] (religion) not hallowed or consecrated
Synonyms: unhallowed
Related terms: holy profane holiness
3. [ adjective ] having committed unrighteous acts
Synonyms: wicked sinful
Examples:

"a sinful person"

Related terms: unrighteous