The story
- Proto-Indo-European*dwóh₁
- Proto-Indo-European*dwi-
- Proto-Hellenic*dwi-
- Ancient Greekδῐ- (dĭ-)
- Latindi-
- Englishdi-
- Ancient Greekτακτικός (taktikós)
- New Latintactica
- Englishtactic
- English todayditactic
Etymology from Wiktionary, CC BY-SA 4.0.