The Collaborative International Dictionary of English v.0.48:
Adjure \Ad*jure"\, v. t. [imp. & p. p. Adjured; p. pr. & vb.
n. Adjuring]. [L. adjurare, adjurdium, to swear to; later,
to adjure: cf. F. adjurer. See Jury.]
To charge, bind, or command, solemnly, as if under oath, or
under the penalty of a curse; to appeal to in the most solemn
or impressive manner; to entreat earnestly.
Joshua adjured them at that time, saying, Cursed be the
man before the Lord, that riseth up and buildeth this
city Jericho. --Josh. vi.
The high priest . . . said . . . I adjure thee by the
living God, that thou tell us whether thou be the
Christ. --Matt. xxvi.
The commissioners adjured them not to let pass so
favorable an opportunity of securing their liberties.