to annul /əˈnʌl/ /əˈnʌl/
to abrogate /ˈæbrəɡeɪt/ /ˈæbrəɡeɪt/
to abolish /əˈbɑlɪʃ/ /əˈbɒlɪʃ/
to revoke /rɪˈvoʊk/ /rɪˈvəʊk/
