The story
- Proto-Indo-European*né
- Proto-Indo-European*n̥-
- Proto-Italic*n̥-
- Latinin-
- Middle Englishin-
- Englishin-
- Proto-Indo-European*h₂éd
- Proto-Italic*ad
- Proto-Italic*ad-
- Latinad-
- Proto-Indo-European[Term?]
- Proto-Italic*apjō
- Latinapiō
- Latinapīscor
- Latinadipīscor
- Latinadeptu
- Frenchadepte
- Englishadept
- Englishinadept
- Proto-Indo-European*leyg-
- Proto-Germanic*līką
- English todayinadeptly
Etymology from Wiktionary, CC BY-SA 4.0.