misdiagram

The story

1. Proto-Indo-European*mey-?
2. Proto-Indo-European*meyth₂-
3. Proto-Germanic*missaz
4. Proto-Germanic*missa-
5. Proto-West Germanic*missa-
6. Old Englishmis-
7. Middle Englishmys-
8. Englishmis-
9. Proto-Indo-European*dwóh₁
10. Proto-Indo-European*trísinflu.
11. Proto-Indo-European*dwís
12. Ancient Greekδιά (diá)
13. Ancient Greekδῐᾰ- (dĭă-)
14. Proto-Indo-European*gerbʰ-
15. Proto-Hellenic*grə́pʰō
16. Ancient Greekγρᾰ́φω (grắphō)
17. Ancient Greekγρᾰ́μμᾰ (grắmmă)
18. Ancient Greekδιάγραμμα (diágramma)
19. Italiandiagramma
20. Frenchdiagramme
21. Englishdiagram
22. English todaymisdiagram

From mis- + diagram.