annul

1 ENTRIES FOUND:
annul /əˈnʌl/ verb
annuls; annulled; annulling
annul
/əˈnʌl/
verb
annuls; annulled; annulling
Britannica Dictionary definition of ANNUL
[+ object]
: to say officially that something is no longer valid : to make (something) legally void

— annulment

/əˈnʌlmənt/ noun, plural annulments