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*ǵeyH-
- Proto-Indo-European*ǵi(H)-l-
- Proto-Germanic*kiljǭ
- Proto-West Germanic*killjā
- Old Dutch*killa
- Middle Dutchkille
- Dutchki
- Englishkill
- Englishkillable
- English todayunkillable
Etymology from Wiktionary, CC BY-SA 4.0.