Renounce
Part of speech: noun
Definition: An act of renouncing.
Part of speech: verb
Definition: To give up, resign, surrender. To cast off, repudiate. To decline further association with someone or something. To abandon, forsake, discontinue (an action, habit, intention, etc), sometimes by open declaration. To make a renunciation of something. To surrender formally some right or trust. (cards) To fail to follow suit; playing a card of a different suit when having no card of the suit led.
Example sentence: The U.S. must renounce any U.S. interest in constructing permanent U.S. military bases in Iraq.
Relinquish
Part of speech: verb
Definition: To give up, abandon or retire from something.To let go (free, away), physically (releaseTo metaphorically surrender, yield control or possession.To accept to give up, withdraw etc.
Example sentence: You'd be surprised how difficult it is relinquish a cell phone.