Dictionary.com has a great service called “Word of the day”. I use to subscribe to it until I realized I would skip days. I ended up with about 200 days that I was behind. I still recommend it if you can keep up.
abrogate AB-ruh-gayt, transitive verb:
1. To annul or abolish by an authoritative act.
2. To put an end to; to do away with.
He also knows that failure to secure a clear unionist majority will leave the UUP [Ulster Unionist Party] leader vulnerable to those pressing for an assembly manifesto which would effectively threaten to abrogate the agreement.
— “Politeness could not mask gulf within the UUP”, Irish Times, May 20, 1998