ad·jure 
(ə-jr)
(ə-jr)tr.v. ad·jured, ad·jur·ing, ad·jures
1. To command or enjoin solemnly, as under oath: "adjuring her in the name of God to declare the truth" (Increase Mather).
2. To appeal to or entreat earnestly.
[Middle English adjuren, from Latin adiūrāre, to swear to : ad-, ad- + iūrāre, to swear; see yewes- in the Appendix of Indo-European roots.]
ad·jurer, ad·juror n.