1. to abandon or renounce a religious faith, belief, or cause that one previously held
Usage: British spelling; American spelling is 'apostatize'; often used in religious or ideological contexts

Examples

• He was accused of apostatising from the church after decades of membership.
• The scholar did not apostatise from her principles despite intense pressure.
• Many citizens apostatised from the regime's ideology during the revolution.
• She refused to apostatise her faith even when threatened.
• The movement lost members who began to apostatise in the 1990s.