Antonyms for "arch angelic" could be words such as "demonic," "infernal," "devilish," or "fiendish." These words describe characteristics that are the opposite of the divine, holy nature often associated with archangels. Demonic refers to something that is evil or demonic in nature, while infernal relates to the underworld or hell. Devilish and fiendish both suggest evil or wicked behavior or tendencies. These antonyms highlight the duality of good and evil, and the contrast between the divine and the devilish. As such, the word "arch angelic" suggests a positive and admirable quality, whereas its antonyms are negative and undesirable.