microenvironmental

The story

1. Proto-Indo-European*mey-der.?
2. Ancient Greekμῑκρός (mīkrós)
3. Ancient Greekμῑκρο- (mīkro-)
4. Englishmicro-
5. Proto-Indo-European*h₁én
6. Proto-Italic*en
7. Old Latinen
8. Latinin
9. Old Frenchen
10. Latinvibrāre?
11. Vulgar Latin*virāre
12. Old Frenchvirer
13. Old Frenchviron
14. Old Frenchenviron
15. Middle Frenchenviron
16. Middle Frenchenvironner
17. Middle Frenchenvironnement
18. Englishenvironment
19. Proto-Indo-European*h₂el-
20. Proto-Indo-European*h₂élisder.?
21. Englishenvironmental
22. English todaymicroenvironmental

From micro- + environmental.