autonomous

The story

1. Proto-Indo-European*h₂ew
2. Proto-Indo-European*tó-
3. Proto-Hellenic*autós
4. Proto-Indo-European*h₂ew
5. Ancient Greekαὖ (aû)
6. Ancient Greekτόν (tón)
7. Ancient Greekαὐτός (autós)
8. Ancient Greekαὐτο- (auto-)
9. Proto-Indo-European*nem-
10. Proto-Indo-European*németi
11. Proto-Hellenic*némō
12. Ancient Greekνέμω (némō)
13. Ancient Greekνόμος (nómos)
14. Ancient Greekαὐτόνομος (autónomos)
15. Ancient Greekαὐτονομῐ́ᾱ (autonomĭ́ā)
16. Englishautonomy
17. Proto-Indo-European*h₃ed-
18. Proto-Indo-European*h₃édosder.?
19. English todayautonomous

From autonomy + -ous.