The story
- Englishbiblio-
- Proto-Indo-European*treb-der.?
- Ancient Greekθερᾰ́πων (therắpōn)
- Ancient Greekθεραπεύω (therapeúō)
- Ancient Greekθεραπεία (therapeía)
- New Latintherapīa
- Englishtherapy
- English todaybibliotherapy
Etymology from Wiktionary, CC BY-SA 4.0.