epitracheal

The story

1. Proto-Indo-European*h₁ep-
2. Proto-Indo-European*h₁éps
3. Proto-Indo-European*h₁épi
4. Proto-Hellenic*epí
5. Ancient Greekἐπί (epí)
6. Ancient Greekἐπῐ- (epĭ-)
7. Englishepi-
8. Proto-Indo-European*dʰreh₂gʰ-
9. Proto-Indo-European*dʰréh₂gʰus
10. Proto-Hellenic*tʰrākʰús
11. Ancient Greekτρᾱχεῖᾰ (trākheîă)
12. Late Latintrāchīa
13. Medieval Latintrāchēa
14. Englishtrachea
15. Proto-Indo-European*h₂el-
16. Proto-Indo-European*h₂élisder.?
17. Englishtracheal
18. English todayepitracheal

From epi- + tracheal.