abjure

/æbˈdʒʊr/
verb
  1. To formally or solemnly give up a belief, claim, or allegiance.
    • She abjured her former political views after years of reflection.
    • The treaty required both sides to abjure the use of force.
    • The knight had to abjure his loyalty to the old king.
Antonyms
What does "abjure" mean? | whatsthatwordmean | whatsthatwordmean