cystoscopy

The story

1. Ancient Greekκύστη (kústē)
2. Proto-Indo-European*(s)kewH-?
3. Proto-Indo-European*ḱewh₁-
4. Proto-Indo-European*ḱuh₁éyeti
5. Ancient Greekκῠ́ω (kŭ́ō)?
6. Ancient Greekκύστις (kústis)
7. Late Latincystis
8. Englishcyst
9. Englishcysto-
10. Proto-Indo-European*speḱ-
11. Proto-Indo-European*spéḱyeti
12. Proto-Hellenic*sképt͏̌omai
13. Ancient Greekσκέπτομαι (sképtomai)
14. Ancient Greekσκοπός (skopós)
15. Ancient Greekσκοπέω (skopéō)
16. English todaycystoscopy

From cysto- + -scopy.