misaccentuate

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*h₂éd
10. Proto-Italic*ad
11. Proto-Italic*ad-
12. Latinad-
13. Proto-Indo-European*keh₂n-
14. Proto-Indo-European*kh₂néti
15. Proto-Italic*kanō
16. Latincanō
17. Latinaccinō
18. Ancient Greekπροσῳδῐ́ᾱ (prosōidĭ́ā)
19. Latinaccentus
20. Latinaccentuō
21. Medieval Latinaccentuātus
22. Englishaccentuate
23. English todaymisaccentuate

From mis- + accentuate.