The story
- Latinīnfrā
- Englishinfra-
- Proto-Indo-European*ǵenh₁-
- Proto-Germanic*kunją
- Proto-Germanic*kuningaz
- Proto-Indo-European*dʰeh₁-
- Proto-Indo-European*dʰóh₁mos
- Proto-Germanic*dōmaz
- Proto-Germanic*kuningadōmaz
- Proto-West Germanic*kuningadōm
- Old Englishcyningdōm
- Middle Englishkingdom
- Englishkingdom
- English todayinfrakingdom
Etymology from Wiktionary, CC BY-SA 4.0.