arsenosugar

The story

1. Proto-Indo-European*ǵʰelh₃-
2. Proto-Indo-European*ǵʰl̥h₃enyom
3. Proto-Indo-Iranian*ȷ́ʰr̥Hanyam
4. Proto-Iranian*jr̥Hanyam
5. Old Median*zaranyam
6. Old Median*kā
7. Old Median*zaraniyakā
8. Middle Persian*zarnīk
9. Classical Syriacܙܪܢܝܟܐ (zarnīḵā)
10. Arabicالزَرْنِيخ (az-zarnīḵ)
11. Medieval Greekἀρσενικόν (arsenikón)
12. Latinarsenicum
13. Middle Frencharsenic
14. Middle Englisharsenik
15. Englisharsenic
16. Englisharseno-
17. Proto-Indo-European*ḱorkeh₂
18. Proto-Indo-Iranian*ćárkaraH
19. Proto-Indo-Aryan*śárkaraH
20. Sanskritशर्क॑रा (śárkarā)
21. Middle Persian𐭱𐭪𐭥 (šakar)
22. Arabicسُكَّر (sukkar)
23. Old Italianzucchero
24. Old Frenchçucre
25. Middle Englishsugre
26. Englishsugar
27. English todayarsenosugar

From arseno- + sugar.