Adjective
1. not hallowed or consecrated
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"3. having committed unrighteous acts;
"a sinful person"