renounce

Synonyms: abdicate abjure abnegate abstain from apostacize arrogate cast off decline defect demit deny desert disavow discard disclaim disown divorce oneself from drop out dump eschew forgo forsake forswear give up leave flat leave off opt out quit rat recant relinquish repudiate resign sell out spurn swear off take the pledge tergiversate tergiverse throw off throw over toss over turn waive walk out on wash hands of

Antonyms: allow approve condone