apostasy (noun) - a rejection or abandonment of one's political party, cause, beliefs, or faith [ uh-pos-tuh-see ]
BREAKDOWN: APO- (away) + STAS- (to stand) + -Y (act or state)
an apostate is one who forsakes principles or faith
“The essence of apostasy is changing sides from that of the crucified to that of the crucifier.” —John Stott