The story
- Proto-Indo-European*h₂ent-
- Proto-Indo-European*h₂énts?
- Proto-Indo-European*h₂m̥bʰí
- Proto-Celtic*ambi-
- Proto-Indo-European*h₂eǵ-
- Proto-Indo-European*h₂éǵeti
- Proto-Celtic*ageti
- Proto-Celtic*ambaxtos
- Gaulishambaxtos
- Proto-Germanic*ambahtaz
- Latinambasciātor
- Old Occitanambaisador
- Old Italianambassatore
- Anglo-Normanambassadeur
- Middle Englishambassadore
- Englishambassador
- Proto-Indo-European*h₂el-
- Proto-Indo-European*h₂élisder.?
- English todayambassadorial
From ambassador + -ial.
Etymology from Wiktionary, CC BY-SA 4.0.