adjure (v.)

late 14c., "to bind by oath; to question under oath;" c. 1400 as "to charge with an oath or under penalty of a curse," from Latin adiurare "confirm by oath, add an oath, to swear to in addition; call to witness," in Late Latin "to put (someone) to an oath," from ad "to" (see ad-) + iurare "swear," from ius (genitive iuris) "law" (see jurist). Related: Adjured; adjuring.