Word Origin & History
heresy
"an opinion of private men different from that of the catholick and orthodox church" [Johnson], c.1225, from O.Fr. heresie, from L. hæresis, "school of thought, philosophical sect," used by Christian writers for "unorthodox sect or doctrine," from Gk. hairesis "a taking or choosing," from haireisthai "take, seize," middle voice of hairein "to choose," of unknown origin. The Gk. word was used in N.T. in ref. to the Sadducees, Pharisees, and even the Christians, as sects of Judaism, but in Eng. bibles it is usually translated sect. Meaning "religious belief opposed to the orthodox doctrines of the Church" evolved in L.L. in the Dark Ages. Heretic (c.1330) is ult. from Gk. hairetikos "able to choose," the verbal adj. of hairein