The story
- Proto-Indo-European*né
- Proto-Indo-European*n̥-
- Proto-Germanic*un-
- Proto-West Germanic*un-
- Old Englishun-
- Middle Englishun-
- Englishun-
- Proto-Indo-European*h₂éd
- Proto-Italic*ad
- Proto-Italic*ad-
- Latinad-
- Proto-Indo-European[Term?]
- Proto-Italic*apjō
- Latinapiō
- Latinapīscor
- Latinadipīscor
- Latinadeptu
- Frenchadepte
- Englishadept
- English todayunadept
Etymology from Wiktionary, CC BY-SA 4.0.