tracheolaryngeal

The story

1. Proto-Indo-European*dʰreh₂gʰ-
2. Proto-Indo-European*dʰréh₂gʰus
3. Proto-Hellenic*tʰrākʰús
4. Ancient Greekτρᾱχεῖᾰ (trākheîă)
5. Late Latintrāchīa
6. Medieval Latintrāchēa
7. Englishtrachea
8. Englishtracheo-
9. Ancient Greekλᾰ́ρῠγξ (lắrŭnx)
10. Latinlarynx
11. New Latinlaryngeus
12. Proto-Indo-European*h₂el-
13. Proto-Indo-European*h₂élisder.?
14. Englishlaryngeal
15. English todaytracheolaryngeal

From tracheo- + laryngeal.