The story
- Proto-Indo-European*h₂erkʷ-
- Proto-Indo-European*h₂erkʷos
- Proto-Italic*arkuos
- Latinarcus
- Old Frencharc
- Old Frencharche
- Middle Englisharch
- Englisharch
- Proto-Indo-European*leyg-
- Proto-Germanic*līką
- English todayarchlike
Etymology from Wiktionary, CC BY-SA 4.0.