ascetic

The story

1. Ancient Greekἀσκέω (askéō)
2. Ancient Greekἀσκητής (askētḗs)
3. Ancient Greekἀσκητῐκός (askētĭkós)
4. Medieval Latinasceticus
5. English todayascetic

First use appears c. 1646. From Medieval Latin asceticus, from Ancient Greek ἀσκητικός (askētikós), from ἀσκητής (askētḗs, “monk, hermit”), from ἀσκέω (askéō, “to exercise”).