The story
- Proto-Indo-European*pós
- Proto-Indo-European*pósti
- Proto-Italic*posti
- Proto-Italic*posteros
- Latinposterus
- Latinposterior
- Englishposterior
- Proto-Indo-European*leyg-
- Proto-Germanic*līką
- English todayposteriorly
Etymology from Wiktionary, CC BY-SA 4.0.