abjuration
n.n. a formal statement where you give up a belief or a habit. It is a serious way to say you no longer want to be part of a group or practice.
n. the formal renunciation of a belief, practice, or allegiance. Often involves a public or legal declaration of abandonment.
The former leader made a public abjuration of his old political views.
After years of practice, the athlete made an abjuration of her sport to focus on her family life.
The treaty required a formal abjuration of all previous hostilities, effectively ending the centuries-long conflict between the two nations.
First attested around 1439. From Middle English abjuracioun, from Latin abiūrātiō (“forswearing, abjuration”), from ab (“from, away from”) + iūrō (“swear or take an oath”), from iūs (“law, right, duty”). Compare French abjuration.