The story
- Proto-Indo-European*h₁ep-
- Proto-Indo-European*h₁éps
- Proto-Indo-European*h₁épi
- Proto-Hellenic*epí
- Ancient Greekἐπί (epí)
- Ancient Greekἐπῐ- (epĭ-)
- Englishepi-
- Proto-Indo-European*bʰeh₂-
- Proto-Indo-European*bʰh₂nyéti
- Proto-Hellenic*pʰáňňō
- Ancient Greekφαίνω (phaínō)
- Ancient Greekφαινόμενον (phainómenon)
- Late Latinphaenomenon
- Englishphenomenon
- Proto-Indo-European*h₂el-
- Proto-Indo-European*h₂élisder.?
- Ancient Greekφαινόμενον (phainómenon)
- Frenchphénomène
- Frenchphénoména
- Englishphenomenal
- Englishepiphenomenal
- English todayepiphenomenally
From epiphenomenal + -ly.
Etymology from Wiktionary, CC BY-SA 4.0.