The story
- Proto-Hellenic*autós
- Proto-Indo-European*h₂ew
- Ancient Greekαὖ (aû)
- Ancient Greekτόν (tón)
- Ancient Greekαὐτός (autós)
- Ancient Greekαὐτο- (auto-)
- Englishauto-
- Englishphosphatase
- English todayautophosphatase
From auto- + phosphatase.
Etymology from Wiktionary, CC BY-SA 4.0.