The story
- Proto-Indo-European*teh₂g-
- Proto-Hellenic*tat͏̌t͏̌ō
- Ancient Greekτάσσω (tássō)
- Ancient Greekτακτικός (taktikós)
- New Latintactica
- English todaytactic
Borrowed from New Latin tactica, from Ancient Greek τακτικός (taktikós, “fit for ordering”), from τάσσω (tássō, “to order, to arrange”).
Etymology from Wiktionary, CC BY-SA 4.0.