The story
- Proto-Indo-European*dwóh₁
- Proto-Indo-European*dwi-
- Proto-Italic*dwi-
- Latinbi-
- Proto-Indo-European*bʰeyd-
- Proto-Indo-European*bʰinédti
- Proto-Italic*findō
- Latinfindō
- Latinbifidus
- English todaybifid
From Latin bifidus (“divided in two”), from bi- (“two”) + -fidus, combining form of findere (“to split”).
Etymology from Wiktionary, CC BY-SA 4.0.