counterculturist

The story

1. Proto-Indo-European*ḱe?
2. Proto-Indo-European*ḱóm
3. Proto-Italic*kom
4. Proto-Italic*kom-
5. Proto-Italic*komteros
6. Proto-Italic*komterād
7. Latincontrā
8. Old Frenchcontre-
9. Anglo-Normancountre-
10. Middle Englishcounter-
11. Englishcounter-
12. Proto-Indo-European*kʷelh₁-
13. Proto-Indo-European*kʷélh₁eti
14. Proto-Italic*kʷelō
15. Latincolō
16. Latincultūra
17. Middle Frenchculture
18. Englishculture
19. Englishcounterculture
20. English todaycounterculturist

From counterculture + -ist.