heretic

The story

1. Ancient Greek · derived fromαἱρέω“to choose”
2. Ancient Greek · derived fromαἱρετικός“able to choose, factious”
3. Ecclesiastical Latin · derived fromhaereticus
4. Old French · derived fromeretique
5. Middle English · inherited fromheretyk
6. English todayheretic

From Middle English heretyk, heretike, from Old French eretique, from Medieval Latin or Ecclesiastical Latin haereticus, from Ancient Greek αἱρετικός (hairetikós, “able to choose, factious”), itself from Ancient Greek αἱρέω (hairéō, “to choose”).