aryldialkylphosphatase

The story

1. Ancient Greekἄρωμα (árōma)
2. Ancient Greekἀρωματικός (arōmatikós)
3. Late Latinarōmaticus
4. Old Frencharomatique
5. Englisharomatic
6. Proto-Indo-European*swel-der.?
7. Ancient Greekῡ̔́λη (hū́lē)
8. Englisharyl
9. Proto-Indo-European*dwóh₁
10. Proto-Indo-European*dwi-
11. Proto-Hellenic*dwi-
12. Ancient Greekδῐ- (dĭ-)
13. Latindi-
14. Englishdi-
15. Akkadian𒎎𒋆𒁉𒍣𒁕 (guḫlum)
16. Aramaicכוחלא (kuḥlā)
17. Arabicكُحْل (kuḥl)
18. Andalusian Arabicكُحُول (kuḥūl)
19. Medieval Latinalcoho
20. Middle Englishalcofol
21. Englishalc(ohol)
22. Englishalkyl
23. Englishdialkyl
24. Proto-Indo-European*bʰeh₂-
25. Proto-Indo-European*bʰéh₂os
26. Proto-Hellenic*pʰáwos
27. Ancient Greekφᾰ́ος (phắos)
28. Ancient Greekφῶς (phôs)
29. Proto-Indo-European*bʰer-
30. Proto-Indo-European*bʰéreti
31. Proto-Hellenic*pʰérō
32. Ancient Greekφέρω (phérō)
33. Ancient Greekφωσφόρος (phōsphóros)
34. Latinphōsphorus
35. Frenchphosphore
36. Frenchphosphate
37. Englishphosphate
38. Proto-Indo-European*dwóh₁
39. Proto-Indo-European*trísinflu.
40. Proto-Indo-European*dwís
41. Ancient Greekδιά (diá)
42. Ancient Greekδῐᾰ- (dĭă-)
43. Proto-Indo-European*steh₂-
44. Proto-Indo-European*stísteh₂ti
45. Proto-Hellenic*hístāmi
46. Ancient Greekῐ̔́στημῐ (hĭ́stēmĭ)
47. Ancient Greekδῐῐ̈́στημῐ (dĭĭ̈́stēmĭ)
48. Ancient Greekδῐᾰ́στᾰσῐς (dĭắstăsĭs)
49. Englishdiastase
50. English todayaryldialkylphosphatase

From aryl + dialkyl + phosphate + -ase.