Where does “exorcistical” come from?
exorcistical (English) comes from English exorcist, from Middle French exorciste, from Latin exorcista, from Ancient Greek ἐξορκιστής, from Ancient Greek ἐξορκίζω, from Ancient Greek ἐξ, from Ancient Greek Ὕπνος, from Proto-Hellenic húpnos — to sleep.
exorcistical (English): Relating to exorcism
Ancestry of “exorcistical”, step by step