biocompartment

The story

1. Proto-Indo-European*gʷeyh₃-
2. Ancient Greekβῐ́ος (bĭ́os)
3. Ancient Greekβῐο- (bĭo-)
4. Englishbio-
5. Proto-Indo-European*ḱe?
6. Proto-Indo-European*ḱóm
7. Proto-Italic*kom
8. Proto-Italic*kom-
9. Latincom-
10. Proto-Indo-European*perh₃-
11. Proto-Indo-European*pérh₃tis?
12. Proto-Italic*partis
13. Latinpars
14. Latinpartiō
15. Latinpartior
16. Latincompartīrī
17. Italiancompartire
18. Italiancompartimento
19. Middle Frenchcompartiment
20. Englishcompartment
21. English todaybiocompartment

From bio- + compartment.