1. renounces or abandons a religious faith, political belief, or cause that one previously held
Usage: British spelling (American: apostatizes); third person singular present tense

Examples

• He apostatises from the church after decades of membership.
• The politician apostatises his former party's ideology.
• She apostatises the strict religious doctrines of her childhood.
• When he apostatises his beliefs, his family feels betrayed.
• The scholar apostatises the scientific consensus he once defended.
• They apostatise their commitment to the movement.