The story
- Englishultra-
- Latinstabili
- Old Frenchestable
- Anglo-Normanstabe
- Middle Englishstable
- Englishstable
- English todayultrastable
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: Very stable. Full definition →
Etymology from Wiktionary, CC BY-SA 4.0.