The story
- Proto-Indo-European*sekʷ-
- Proto-Indo-European*sokʷéh₂
- Proto-Indo-European*sokʷh₂ṓy
- Proto-Indo-European*sokʷyós
- Proto-Italic*sokjos
- Latinsokios
- Latinsocius
- Englishsocio-
- Proto-Indo-European*(s)peys-der.?
- Latinspīrō
- Latinspīritus
- Proto-Indo-European*h₂el-
- Proto-Indo-European*h₂élisder.?
- Late Latinspīrituālis
- Old Frenchspiritue
- Middle Englishspiritual
- Englishspiritual
- English todaysociospiritual
Etymology from Wiktionary, CC BY-SA 4.0.