abjure / adjure
Two formal verbs that look alike and mean different things.
To abjure is to renounce or reject, often under oath or with formality. To adjure is to charge or urge someone solemnly to do something. If you mean “give up,” the word is abjure. If you mean “beseech or command,” the word is adjure.
Examples
UseHe abjured violence after the trial.
UseShe adjured the witnesses to tell the truth.
AvoidShe abjured the witnesses to tell the truth.