To surrender formally some right or trust.
To cast off, repudiate.
To abandon, forsake, discontinue (an action, habit, intention, etc), sometimes by open declaration.
To fail to follow suit; playing a card of a different suit when having no card of the suit led.
To make a renunciation of something.
To give up, resign, surrender.
To decline further association with someone or something, disown.
An act of renouncing.
To render valid.
To check or prove the validity of; verify.
To have its validity successfully proven.