Anathema means excommunication, execration, curse, energetic reproach. From the Greek “Anathema” (thing put aside), formed from the preposition “a-N-A” (beside) more "tithemi" (put on).
Anathema is a canonical word (relating to church rules) that refers to the condemnation of a doctrine contrary to any truth of the Gospel of Christ.
Anathema is the expulsion, condemnation, excommunication and execration, from the bosom of the Church, of anyone who follows a doctrine contrary to the truth of the Catholic faith. The adjectives excommunicated, cursed and cursed qualify those individuals who condemn the heritage of the Catholic faith.
Anathema and the New Testament
In the New Testament, according to scholars, the term anathema is employed as curse, execration, reproach.
In Galatians 1:8, the apostle Paul writes: “there is no other gospel – I am amazed that you are so quickly abandoning the one who called you through the grace of Christ to accept another gospel. In reality, however, there is no other gospel. There are only people who are sowing confusion among you, and want to misrepresent the Gospel of Christ. Cursed is he who announces to you a gospel different from the one we announce, even if we are ourselves or some angel from heaven”.