abjure \ab-JOOR\ (verb tr.) - 1 : To renounce under oath; forswear. 2 : To recant solemnly; repudiate. 3 : To give up (an action or practice, for example); abstain from.
"Barbara abjured from telling her best friend of her husband's affair after he abjured from ever engaging in such behavior again."
Middle English abjuren, from Old French abjurer, from Latin abiurare : ab-, away + iurare, to swear.