adjuration (n.)

late 14c., "exorcism," from Late Latin adiurationem (nominative adiuratio) "a swearing to," noun of action from past participle stem of Latin adiurare "to put (someone) to an oath," from ad "to" (see ad-) + iurare "swear," from ius (genitive iuris) "law," from PIE root *yewes- "law" (see jurist). Originally a term in exorcism (with conjuration); the general sense "a solemn oath, a charging under the penalty of a curse" is from 17c.