Abrogation
Part of speech: noun
Definition: The act of abrogating; a repeal by authority - David Hume
Repeal
Part of speech: verb
Definition: To cancel.
Example sentence: I opposed the Defense of Marriage Act in 1996. It should be repealed and I will vote for its repeal on the Senate floor. I will also oppose any proposal to amend the U.S. Constitution to ban gays and lesbians from marrying.