anticonceptualistic

The story

1. Proto-Indo-European*h₂ent-
2. Proto-Indo-European*h₂énts
3. Proto-Indo-European*h₂énti
4. Ancient Greekᾰ̓ντῐ́ (ăntĭ́)
5. Ancient Greekἀντι- (anti-)
6. Englishanti-
7. Proto-Indo-European*ḱe?
8. Proto-Indo-European*ḱóm
9. Proto-Italic*kom
10. Proto-Italic*kom-
11. Latincon-
12. Proto-Indo-European*kap-
13. Proto-Indo-European*kapyéti
14. Proto-Italic*kapjō
15. Latincapiō
16. Ancient Greekσῠλλᾰμβᾰ́νω (sŭllămbắnō)
17. Latinconcipiō
18. Latinconceptus
19. Proto-Indo-European*h₂el-
20. Proto-Indo-European*h₂élisder.?
21. Medieval Latinconceptuālis
22. Englishconceptual
23. Englishconceptualist
24. Englishconceptualistic
25. English todayanticonceptualistic

From anti- + conceptualistic.