The story
- Proto-Indo-European*kʷetwóres
- Proto-Indo-European*kʷetwr̥-
- Proto-Italic*kʷetru-
- Proto-Indo-European*ped-
- Proto-Indo-European*pṓds
- Proto-Italic*pets
- Proto-Italic*kʷetrupōts
- Latinquadrupedem
- Frenchquadrupède
- Englishquadruped
- Proto-Indo-European*h₂el-
- Proto-Indo-European*h₂élisder.?
- Englishquadrupedal
- Proto-Indo-European*h₂ews-
- Proto-Indo-European*h₂ewsér
- Proto-Hellenic*auhḗr
- Ancient Greekἀήρ (aḗr)
- Proto-Indo-European*gʷeyh₃-
- Ancient Greekβίος (bíos)
- Frenchaérobie
- Englishaerobic
- Englishaerobics
- Englishquadrobicsbf.?
- English todayquadrobic
Possibly a back-formation from quadrobics.
Etymology from Wiktionary, CC BY-SA 4.0.