To Renounce

1. (transitive) To give up, resign, surrender, atsake.
2. (transitive) To cast off, repudiate.
3. (transitive) To decline further association with someone or something, disown.
4. (transitive) To abandon, forsake, discontinue (an action, habit, intention, etc), sometimes by open declaration.
5. (intransitive) To make a renunciation of something.
6. (intransitive) To surrender formally some right or trust.
7. (intransitive, card games) To fail to follow suit; playing a card of a different suit when having no card of the suit led.

forsay

forswear