(v.)  /ˈabrəɡeɪt/

Here’s another nifty word that doesn’t get used much. It means to repeal or strike down a formal agreement, right, or law. Alternately, it can mean to disregard or evade one’s responsibilities. I think it carries a bit more impact than ‘repeal,’ for when you really want that extra emphasis. Be eloquent!

Examples of use:
1. The government rejected a proposal to abrogate the right to strike.
The law which prevented voting equality was abrogated many years ago.

2. We believe the board is abrogating its responsibilities to its shareholders.

There is also a noun form, abrogator: a person or thing which abrogates, or has abrogated, something.
Handy, right?

Etymology: Early 16th century; from the Latin abrogat- ‘repealed’, derived from the verb abrogare (ab- ‘away, from’ +rogare ‘propose a law’.)