Arch-angelic is a word used to describe something that is divine, heavenly or angelic in nature. Its antonyms are words that describe something that is the opposite of angelic or divine. These words include demonic, evil, unholy, wicked, and sinful. Demonic refers to something that is evil and devilish in nature, while evil refers to anything morally wrong or wicked. Unholy denotes something that is not sacred or pure, while wicked suggests a deliberate intention to do evil. Sinful refers to anything that violates moral or ethical codes. In summary, the antonyms for arch-angelic are words that describe something that is sinister or immoral, rather than pure and holy.