The story
- Proto-Indo-European*h₃reǵ-
- Proto-Indo-European*h₃réǵeti
- Proto-Italic*regō
- Latinregō
- Latinrēgula
- Proto-West Germanic*regulu
- Old Englishregol
- Latinrēgula
- Old Frenchreille
- Middle Englishrail
- Englishrail
- Ancient Greekχάρτης (khártēs)
- Latincharta
- Old Frenchcarte
- Middle Englishcarde
- Englishcard
- English todayrailcard
Etymology from Wiktionary, CC BY-SA 4.0.