abjure - vt. (맹세하고) 신앙, 주의를 저버리다

• With a crusade, Ninoslav was baptized, only to abjure Christianity in 1233.
• When he came into the theatre the proconsul urged him to "revile Christ," and promised, if he would consent to abjure his faith, that he would set him at liberty.
• He abjured his religion at a very young age.