The story
- Proto-Indo-European*h₃ekʷ-
- Ancient Greekὄπωπᾰ (ópōpă)
- Ancient Greekὀπτός (optós)
- Englishopto-
- 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
- Englishoptomechanical
- Proto-Indo-European*leyg-
- Proto-Germanic*līką
- English todayoptomechanically
From optomechanical + -ly.
Etymology from Wiktionary, CC BY-SA 4.0.