exorcising

transitive verb exorcised or exorcized, exorcising or exorcizing

1. to drive (an evil spirit or spirits) out or away by ritual prayers, incantations, etc.
2. Rare to adjure (such a spirit or spirits)
3. to free from such a spirit or spirits

Origin: ME exorcisen < LL(Ec) exorcizare < Gr exorkizein, to swear a person (in N.T., to banish an evil spirit) < ex-, out + horkizein, to make one swear < horkos, an oath, akin to horkanē, enclosure, herkos, fence, prob. < IE base *ser-, wickerwork > L sarcire, to patch