cricotracheal

The story

1. Ancient Greekκρῐ́κος (krĭ́kos)
2. Proto-Indo-European*weyd-
3. Proto-Indo-European*wéydos
4. Proto-Hellenic*wéidos
5. Ancient Greekεἶδος (eîdos)
6. Ancient Greekκρῐκοειδής (krĭkoeidḗs)
7. New Latincricoīdēs
8. Englishcricoid
9. Englishcrico-
10. Proto-Indo-European*dʰreh₂gʰ-
11. Proto-Indo-European*dʰréh₂gʰus
12. Proto-Hellenic*tʰrākʰús
13. Ancient Greekτρᾱχεῖᾰ (trākheîă)
14. Late Latintrāchīa
15. Medieval Latintrāchēa
16. Englishtrachea
17. Proto-Indo-European*h₂el-
18. Proto-Indo-European*h₂élisder.?
19. Englishtracheal
20. English todaycricotracheal

From crico- + tracheal.