meniscectomy

The story

1. Proto-Indo-European*med-
2. Proto-Indo-European*meh₁-?
3. Proto-Indo-European*mḗh₁n̥s
4. Proto-Hellenic*méns
5. Ancient Greekμείς (meís)
6. Ancient Greekμηνῐ́σκος (mēnĭ́skos)
7. Englishmeniscus
8. Proto-Indo-European*h₁éǵʰ
9. Proto-Indo-European*h₁eǵʰs
10. Proto-Hellenic*eks
11. Ancient Greekἐκ (ek)
12. Ancient Greekἐκ- (ek-)
13. Proto-Indo-European*temh₁-
14. Ancient Greekτέμνω (témnō)
15. Ancient Greekἐκτέμνω (ektémnō)
16. Ancient Greekἐκτομή (ektomḗ)
17. English todaymeniscectomy

From meniscus + -ectomy.