unetymologically

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. Proto-Indo-European*set-?
9. Ancient Greekἐτεός (eteós)der.?
10. Ancient Greekἔτυμος (étumos)
11. Proto-Indo-European*leǵ-
12. Proto-Indo-European*lóǵos
13. Proto-Hellenic*lógos
14. Ancient Greekλόγος (lógos)
15. Ancient Greekἐτῠμόλογος (etŭmólogos)
16. Ancient Greekἐτῠμολογῐ́ᾱ (etŭmologĭ́ā)
17. Latinetymologia
18. Old Frenchethimologie
19. Middle Englishethymologie
20. Englishetymology
21. Proto-Indo-European*h₂el-
22. Proto-Indo-European*h₂élisder.?
23. Englishetymological
24. Englishunetymological
25. Proto-Indo-European*leyg-
26. Proto-Germanic*līką
27. English todayunetymologically

From unetymological + -ly.