The story
- Proto-Indo-European*h₁én
- Proto-Indo-European*h₁énteros
- Latin*interus
- Latinintrā
- Englishintra-
- Latinquadrus
- Vulgar Latin*exquadrō
- Italiansquadraredeverb.
- Italiansquadra
- Frenchescouade
- Englishsquad
- English todayintrasquad
Etymology from Wiktionary, CC BY-SA 4.0.