alphabetise

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. English todayalphabetise

From alphabet + -ise.