nonsugar

The story

1. Proto-Indo-European*né
2. Proto-Germanic*ne
3. Proto-Indo-European*ís?
4. Proto-Indo-European*h₁óynos
5. Proto-Germanic*ainaz
6. Proto-Germanic*nainaz
7. Proto-West Germanic*nain
8. Old Englishnān
9. Middle Englishnon
10. Old Englishnān
11. Old Englishnān-
12. Middle Englishnon-
13. Englishnon-
14. Proto-Indo-European*ḱorkeh₂
15. Proto-Indo-Iranian*ćárkaraH
16. Proto-Indo-Aryan*śárkaraH
17. Sanskritशर्क॑रा (śárkarā)
18. Middle Persian𐭱𐭪𐭥 (šakar)
19. Arabicسُكَّر (sukkar)
20. Old Italianzucchero
21. Old Frenchçucre
22. Middle Englishsugre
23. Englishsugar
24. English todaynonsugar

From non- + sugar.