neorealistically

The story

1. Proto-Indo-European*nu
2. Proto-Indo-European*néwos
3. Proto-Hellenic*néwos
4. Ancient Greekνέος (néos)
5. Ancient Greekνεο- (neo-)
6. Englishneo-
7. Proto-Indo-European*(H)reh₁-
8. Proto-Indo-European*(H)reh₁ís
9. Proto-Italic*reis
10. Classical Latinrēs
11. Proto-Indo-European*h₂el-
12. Proto-Indo-European*h₂élisder.?
13. Late Latinreālis
14. Old Frenchree
15. Middle Englishreal
16. Englishreal
17. Englishrealist
18. Englishrealistic
19. Englishneorealistic
20. Proto-Indo-European*leyg-
21. Proto-Germanic*līką
22. English todayneorealistically

From neorealistic + -ally.