exorcism

The word 'exorcism' originates from the Late Latin exorcismus, which itself derives from the Greek exorkismos, meaning "a binding by oath." This Greek term is built from the prefix ex- (out) and horkos (oath). The core logic of the word lies in the ancient practice of commanding an evil spirit to depart by invoking a sacred or divine authority, effectively putting the spirit under a binding oath to obey. Over centuries, this specific Greco-Latin compound was adopted into ecclesiastical Latin and later into English, where it narrowed to its current specialized meaning of the ritual act of expelling a demonic entity.

Structure: ex (out) + orc (bind by oath) + ism (act or practice) - ex: A Latin prefix meaning "out of, from, thoroughly." - orc: From the Greek root horkos (ὅρκος), meaning "oath." In this context, it refers to binding or adjuring a spirit by a sacred oath. - ism: A suffix of Greek origin (-ismos) used to form nouns indicating an action, practice, or process.