The story
- Proto-Indo-European*h₂eḱ-
- Proto-Indo-European*h₂eḱéh₁yeti
- Proto-Italic*akēō
- Latinaceō
- Latinacēscō
- Latinacētum
- Proto-West Germanic*aket
- Proto-West Germanic*atek
- Old High Germaneȥȥih
- Middle High Germaneȥȥich
- GermanEssich
- GermanEssig
- Proto-Indo-European*h₂eydʰ-
- Proto-Hellenic*áitʰō
- Ancient Greekαἴθω (aíthō)
- Ancient Greekᾱ̓ήρ (āḗr)influ.?
- Ancient Greekαἰθήρ (aithḗr)
- Latinaethēr
- GermanÄther
- GermanEster
- Englishester
- Proto-Indo-European*dʰeh₁-
- Proto-Italic*θakos
- English todayesterify
From ester + -ify.
Etymology from Wiktionary, CC BY-SA 4.0.