emepronium

Etymology tree
Proto-Indo-European *h₂eydʰ-der.
Proto-Hellenic *áitʰō
Ancient Greek αἴθω (aíthō)
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Ancient Greek ᾱ̓ήρ (āḗr)influ.?
Ancient Greek αἰθήρ (aithḗr)der.
Latin aethērbor.
German Äther
German Ether
Proto-Indo-European *swel-der.?
Ancient Greek ῡ̔́λη (hū́lē)der.
German -yl
German Ethylbor.
English ethyl
Proto-Indo-European *médʰu
Proto-Hellenic *métʰu
Ancient Greek μέθυ (méthu)
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German -yl
German Methylbor.
English methyl
French propionique
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Ancient Greek ῡ̔́λη (hū́lē)der.
French -yle
French propyl-der.
English propyl
New Latin ammōniumbor.
English ammonium
English onium
English -onium
English emepronium
From e(thyl) + me(thyl) + pro(pyl) + -onium (“quaternary ammonium compound”).