genocidal

The story

1. Proto-Indo-European*ǵenh₁-
2. Proto-Indo-European*ǵénh₁os
3. Proto-Hellenic*génos
4. Ancient Greekγένος (génos)
5. Proto-Indo-European*kh₂eyd-
6. Proto-Indo-European*kh₂éydeti
7. Proto-Italic*kaidō
8. Latincaedō
9. Englishgenocide
10. Proto-Indo-European*h₂el-
11. Proto-Indo-European*h₂élisder.?
12. English todaygenocidal

From genocide + -al.