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Verb: apostatize  u'pós-tu,tIz
  1. Abandon one's beliefs or allegiances
    "the apostle shows that if a true Christian were to apostatize, nothing would remain for him but the terrific prospect of eternal condemnation";
    - apostatise [Brit], tergiversate

Derived forms: apostatized, apostatizes, apostatizing

Type of: disown, renounce, repudiate

Encyclopedia: Apostatize