unacademic

The story

1. Proto-Indo-European*né
2. Proto-Indo-European*n̥-
3. Proto-Germanic*un-
4. Proto-West Germanic*un-
5. Old Englishun-
6. Middle Englishun-
7. Englishun-
8. Ancient GreekἈκάδημος (Akádēmos)
9. Ancient GreekἈκαδημία (Akadēmía)
10. Ancient GreekἈκάδημος (Akádēmos)
11. Ancient GreekἈκαδήμεια (Akadḗmeia)
12. Ancient Greekἀκαδημικός (akadēmikós)
13. Medieval Latinacadēmicus
14. Latinacadēmicu
15. Frenchacadémique
16. Englishacademic
17. English todayunacademic

From un- + academic.