abjure

Short definition from Wiktionary

Verb

1. 1
   To solemnly reject (someone or something); to abandon (someone or something) forever; to disavow, to disclaim, to repudiate.
2. 2
   To renounce (something) upon oath; to forswear; specifically, to recant or retract (a heresy or some other opinion); to withdraw.
3. 3
   To cause (someone) to recant or retract (a heresy or some other opinion).
4. 4
   Especially in abjure the realm: to swear an oath to leave (a place) forever.
5. 5
   To cause or compel (someone) to leave a place forever; to banish.
6. 6
   To solemnly reject; to abandon forever.
7. 7
   To recant or retract a heresy on oath.
8. 8
   To swear an oath to leave a place forever.