transtracheal

The story

1. Proto-Indo-European*terh₂-
2. Proto-Indo-European*térh₂t
3. Proto-Indo-European*tr̥h₂ónts
4. Proto-Indo-European*tr̥h₂n̥ts
5. Proto-Italic*trāns
6. Proto-Italic*trāns-
7. Latintrans-
8. Englishtrans-
9. Proto-Indo-European*dʰreh₂gʰ-
10. Proto-Indo-European*dʰréh₂gʰus
11. Proto-Hellenic*tʰrākʰús
12. Ancient Greekτρᾱχεῖᾰ (trākheîă)
13. Late Latintrāchīa
14. Medieval Latintrāchēa
15. Englishtrachea
16. Proto-Indo-European*h₂el-
17. Proto-Indo-European*h₂élisder.?
18. Englishtracheal
19. English todaytranstracheal

From trans- + tracheal.