The story
- Proto-Indo-European*h₂el-
- Latinūls
- Latinultrā
- Englishultra-
- Englishstructure
- Englishultrastructure
- Proto-Indo-European*h₂el-
- Proto-Indo-European*h₂élisder.?
- English todayultrastructural
From ultrastructure + -al.
Etymology from Wiktionary, CC BY-SA 4.0.