heresyyoudaoicibaDictYouDict
heresy: [13] Etymologically, a heresy is a ‘choice’ one makes. The word comes ultimately from Greek haíresis ‘choice’, a derivative of hairein ‘take, choose’. This was applied metaphorically to a ‘course of action or thought which one chooses to take’, hence to a particular ‘school of thought’, and ultimately to a ‘faction’ or ‘sect’. The word passed into Latin as haeresis, which early Christian writers used for ‘unorthodox sect or doctrine’, and thence via Vulgar Latin *heresia and Old French heresie into English. (Another derivative of hairein, incidentally, was diairein ‘divide’, from which English gets diaeresis [17].)
=> diaeresis
heresiarch (n.)youdaoicibaDictYouDict
1620s, from Church Latin haeresiarcha, from Late Greek hairesiarkhes (see heresy + arch-).
heresy (n.)youdaoicibaDictYouDict
"an opinion of private men different from that of the catholick and orthodox church" [Johnson], c. 1200, from Old French heresie (12c.), from Latin hæresis, "school of thought, philosophical sect," used by Christian writers for "unorthodox sect or doctrine," from Greek hairesis "a taking or choosing, a choice," from haireisthai "take, seize," middle voice of hairein "to choose," of unknown origin, perhaps from PIE *ser- (5) "to seize" (cognates: Hittite šaru "booty," Welsh herw "booty").

The Greek word was used in the New Testament in reference to the Sadducees, Pharisees, and even the Christians, as sects of Judaism, but in English bibles it usually is translated sect. Meaning "religious belief opposed to the orthodox doctrines of the Church" evolved in Late Latin. Transferred (non-religious) use from late 14c.
TheresayoudaoicibaDictYouDict
also Teresa, fem. proper name, from French Thérèse, from Latin Therasia, apparently from Greek Therasia, name of two volcanic islands, one near Sicily, one near Crete. In the top 50 most popular names for girls born in the U.S. from 1953 to 1969.
adherescentyoudaoicibaDictYouDict
"Adhering or tending to adhere; adhesive; associated. rare after 18th cent", Mid 18th cent.; earliest use found in Henry Fielding (1707–1754), author and magistrate. From classical Latin adhaerēscent-, adhaerēscēns, present participle of adhaerēscere to stick, adhere, or become attached (to), to stick close (to a person or place) from adhaerēre + -ēscere.