epiphenomenally

Etymology tree
Proto-Indo-European *h₁ep-der.
Proto-Indo-European *h₁épsder.
Proto-Indo-European *h₁epi
Proto-Hellenic *epí
Ancient Greek ἐπί (epí)
Ancient Greek ἐπῐ- (epĭ-)der.
English epi-
Proto-Indo-European *bʰeh₂-der.
Proto-Hellenic *pʰáňňō
Ancient Greek φαίνω (phaínō)
Ancient Greek φαινόμενον (phainómenon)bor.
Late Latin phaenomenonder.
English phenomenon
Proto-Indo-European *h₂el-der.?
Proto-Italic *-ālis
Latin -ālisbor.
Old French -albor.
▲
Latin -ālis
Old French -elbor.
▲
Latin -ālisbor.
Middle English -al
English -al
▲
Ancient Greek φαινόμενον (phainómenon)bor.
French phénomène
▲
Old French -al
Middle French -al
French -al
French phénoménalbor.
English phenomenal
English epiphenomenal
Proto-Indo-European *leyg-der.
Proto-Germanic *līkąder.
Proto-Germanic *-līkaz
Proto-Germanic *-ê
Proto-Germanic *-līkê
Proto-West Germanic *-līkē
Old English -līċe
Middle English -ly
English -ly
English epiphenomenally
From epiphenomenal + -ly.