Synonyms :

demit, renounce, resign, relinquish, abandon, leave, relinquish, surrender, drop, withdraw, discard, cashier, cast, jettison, reject, scrap, shed, slough, throw away, throw out

Antonyms :

appropriate, arrogate, confiscate, grab, seize, take over, wrest, assume, usurp, keep, retain, treasure