The story
- Proto-Indo-European*h₁én
- Proto-Indo-European*h₁énteros
- Latin*interus
- Latinintrā
- Englishintra-
- Ancient Greekβακτηρία (baktēría)
- Ancient Greekβακτήριον (baktḗrion)
- New Latinbactēria
- Englishbacteria
- Proto-Indo-European*h₂el-
- Proto-Indo-European*h₂élisder.?
- Englishbacterial
- Englishbacterially
- English todayintrabacterially
From intra- + bacterially.
Etymology from Wiktionary, CC BY-SA 4.0.