abjure
v//æbˈd͡ʒʊ(ə)ɹ//avsvära
(historical) To renounce (something) upon oath; to forswear; specifically, to recant or retract (a heresy or some other opinion); to withdraw. [from 15th c.]
To solemnly reject (someone or something); to abandon (someone or something) forever; to disavow, to disclaim, to repudiate. [from 15th c.]