The story
- Proto-Indo-European*wed-
- Proto-Indo-European*wódr̥
- Proto-Hellenic*údōr
- Ancient Greekῡ̆̔́δωρ (hū̆́dōr)
- Ancient Greekῠ̔δρο- (hŭdro-)
- Englishhydro-
- Proto-Indo-European*megʰ-der.?
- Ancient Greekμηχανή (mēkhanḗ)
- Ancient Greekμηχανικός (mēkhanikós)
- Latinmēchanicus
- Old Frenchmecanique
- Middle Englishmechanic
- Proto-Indo-European*h₂el-
- Proto-Indo-European*h₂élisder.?
- Middle Englishmechanical
- Englishmechanical
- Englishhydromechanical
- Proto-Indo-European*leyg-
- Proto-Germanic*līką
- English todayhydromechanically
From hydromechanical + -ly.
Etymology from Wiktionary, CC BY-SA 4.0.