abjurement
n. C2 Proficiency ab·jure·ment
n. a formal statement where someone officially gives up a belief or a position. It is a very old word used in legal or religious contexts.
n. a formal renunciation of a belief, office, or allegiance. Often used in legal or historical contexts to describe the act of swearing off a specific claim or status.
The king issued an abjurement of his former titles.
The historical document contains an abjurement of the old faith by the subject who had previously served in the clergy.
The treaty required a formal abjurement of the previous claims to the disputed territory, effectively ending the centuries-long conflict between the two nations.
From abjure + -ment.