The story
- Proto-Indo-European*treb-der.?
- Ancient Greekθερᾰ́πων (therắpōn)
- Ancient Greekθεραπεύω (therapeúō)
- Ancient Greekθερᾰπευτής (therăpeutḗs)
- Ancient Greekθεραπευτικός (therapeutikós)
- New Latintherapeuticus
- Middle Englishterapeucia
- English todaytherapeutic
From Middle English terapeucia, from New Latin therapeuticus (“curing, healing”), from Ancient Greek θεραπευτικός (therapeutikós, “attentive, helpful, obliging, curative”), from θεραπευτής (therapeutḗs, “one who waits on another, an attendant”), from θεραπεύω (therapeúō, “I wait on, attend, serve, cure”).
Etymology from Wiktionary, CC BY-SA 4.0.