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tr.v. ab·jured, ab·jur·ing, ab·jures
1. To recant solemnly; renounce or repudiate: "For nearly 21 years after his resignation as Prime Minister in 1963, he abjured all titles, preferring to remain just plain 'Mr.'" (Time).
2. To renounce under oath; forswear.
[Middle English abjuren, from Old French abjurer, from Latin abiūrāre : ab-, away; see ab-1 + iūrāre, to swear; see yewes- in Indo-European roots.]