The story
- Proto-Indo-European*dwóh₁
- Proto-Indo-European*dwi-
- Proto-Italic*dwi-
- Latinbi-
- Englishbi-
- Englishpartisan
- Englishbipartisan
- Proto-Germanic*skapjaną
- English todaybipartisanship
From bipartisan + -ship.
Etymology from Wiktionary, CC BY-SA 4.0.