The story
- Proto-Hellenic*tʰā́wā
- Ancient Greekθέᾱ (théā)
- Proto-Indo-European*wer-
- Proto-Indo-European*h₃ekʷ-
- Proto-Indo-European*weyd-
- Ancient Greekὁράω (horáō)
- Ancient Greek*θεᾱ-(ϝ)ορός, *θεη-(ϝ)ορός (*theā-(w)orós, *theē-(w)orós)
- Ancient Greekθεωρός (theōrós)
- Ancient Greekθεωρία (theōría)
- Late Latintheōria
- Middle Frenchthéorie
- Englishtheory
- English todaytheorist
Etymology from Wiktionary, CC BY-SA 4.0.