antiadhesion

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*h₂éd
8. Proto-Italic*ad
9. Proto-Italic*ad-
10. Latinad-
11. Latinhaereō
12. Latinadhaereō
13. Latinadhaesiōnem
14. Frenchadhésion
15. Englishadhesion
16. English todayantiadhesion

From anti- + adhesion.