The story
- Proto-Indo-European*úd
- Proto-Germanic*ūt
- Proto-Germanic*ūt-
- Old Englishūt-
- Middle Englishut-
- Englishout-
- Proto-Indo-European*upó
- Proto-Italic*supo
- Latinsub
- Latinsub-
- Proto-Indo-European*h₃reǵ-
- Proto-Indo-European*h₃réǵeti
- Proto-Italic*regō
- Latinregō
- Latinsubrigō
- Latinsurrigō
- Latinsurgere
- Old Frenchsourdre
- Old Frenchsours
- Middle Englishsours
- Englishsource
- English todayoutsource
Etymology from Wiktionary, CC BY-SA 4.0.