alphanumerical

The story

1. Proto-Semitic*ʔalp-
2. Phoenician𐤀𐤋𐤐 (ʾlp)
3. Ancient Greekἄλφα (álpha)
4. Proto-Semitic*bayt-
5. Phoenician𐤁𐤕 (bt)
6. Ancient Greekβῆτᾰ (bêtă)
7. Ancient Greekἀλφάβητος (alphábētos)
8. Medieval Greekἀλφάβητον (alphábēton)
9. Classical Latinalphabētum
10. Middle Englishalphabete
11. Englishalphabet
12. Englishalpha-
13. Proto-Indo-European*nem-
14. Proto-Italic*nomezos
15. Latinnumerus
16. Frenchnumérique
17. Englishnumeric
18. Proto-Indo-European*h₂el-
19. Proto-Indo-European*h₂élisder.?
20. Englishnumerical
21. English todayalphanumerical

From alpha- + numerical.