cystectomy

The story

1. Proto-Indo-European*(s)kewH-?
2. Proto-Indo-European*ḱewh₁-
3. Proto-Indo-European*ḱuh₁éyeti
4. Ancient Greekκῠ́ω (kŭ́ō)?
5. Ancient Greekκύστις (kústis)
6. Late Latincystis
7. Englishcyst
8. Ancient Greekἐκ (ek)
9. Ancient Greekἐκ- (ek-)
10. Proto-Indo-European*temh₁-
11. Ancient Greekτέμνω (témnō)
12. Ancient Greekἐκτέμνω (ektémnō)
13. Ancient Greekἐκτομή (ektomḗ)
14. English todaycystectomy

From cyst (“bladder”) + -ectomy (“surgical removal”).