diabolus

The story

1. Proto-Indo-European*dwóh₁
2. Proto-Indo-European*trísinflu.
3. Proto-Indo-European*dwís
4. Ancient Greekδιά (diá)
5. Ancient Greekδια- (dia-)
6. Proto-Indo-European*gʷelH-
7. Proto-Hellenic*gʷəlnō
8. Ancient Greekβάλλω (bállō)
9. Ancient Greekδιαβάλλω (diabállō)
10. Ancient Greekδιάβολος (diábolos)
11. Latindiabolus
12. English todaydiabolus

From Latin diabolus. Doublet of devil, diable, and diablo.

Words from the same roots