microcompartmentation

The story

1. Proto-Indo-European*mey-der.?
2. Ancient Greekμῑκρός (mīkrós)
3. Ancient Greekμῑκρο- (mīkro-)
4. Englishmicro-
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. Englishcompartmentation
22. English todaymicrocompartmentation

From micro- + compartmentation.