Webster's Revised Unabridged Dictionary · 1913

Abjure

Abjure ({not transcribed}) , transitive verb

[Latin abjurare to deny upon oath; ab + jurare to swear, from jus, juris, right, law; compare French abjurer. See Jury.]

1.
To renounce upon oath; to forswear; to disavow; as, to abjure allegiance to a prince. To abjure the realm, is to swear to abandon it forever.
2.
To renounce or reject with solemnity; to recant; to abandon forever; to reject; repudiate; as, to abjure errors.
Magic I here abjure. — Shakespeare

Abjure , intransitive verb

To renounce on oath. — Bp. Burnet