The story
- Proto-Indo-European*tréyes
- Proto-Indo-European*tri-
- Proto-Italic*tri-
- Latintri-
- Englishtri-
- Proto-Indo-European*wed-
- Proto-Indo-European*wódr̥
- Proto-Hellenic*údōr
- Ancient Greekῡ̆̔́δωρ (hū̆́dōr)
- Ancient Greekὑδρο- (hudro-)
- Frenchhydr-
- Frenchhydrate
- Englishhydrate
- English todaytrihydrate
Etymology from Wiktionary, CC BY-SA 4.0.