The story
- Proto-Indo-European*h₂el-
- Latinūls
- Latinultrā
- Englishultra-
- Proto-Indo-European*bʰeydʰ-
- Proto-Indo-European*bʰeydʰós
- Proto-Italic*feiðos
- Latinfoedus
- Proto-Indo-European*h₂el-
- Proto-Indo-European*h₂élisder.?
- Frenchfédéra
- Englishfederal
- Englishfederalist
- English todayultrafederalist
From ultra- + federalist.
Etymology from Wiktionary, CC BY-SA 4.0.