Where does “ambassadorial” come from?

Ambassadorial comes from English ambassador plus the Latin suffix -alis, which derives from Anglo-Norman ambassadeur, ultimately from Italian ambassadore.

ambassadorial (English): Of or pertaining to an ambassador

Definitions

Of or pertaining to an ambassador

Ancestry of “ambassadorial”, step by step

Step	Language	Word	Meaning
1	English	ambassador	A minister of the highest rank sent to a foreign...
2	Middle English	ambassadore	—
3	Anglo-Norman	ambassadeur	ambassador
4	Old Italian	ambassadore	—
5	Old Occitan	ambaisador	ambassador
6	Old Occitan	ambaissa	service, mission, errand; message
7	Latin	ambactia	—
8	Proto-Germanic	ambahtiją	service, ministry, office, message
9	Proto-Germanic	ambahtaz	servant
10	Gaulish	ambaxtos	vassal, high-ranking servant
11	Proto-Celtic	ambaxtos	servant
12	Proto-Indo-European	h₂eǵ-	to drive

Words derived from “ambassadorial”

ambassadorially
unambassadorial

Every word from Proto-Indo-European h₂eǵ- →

ambassadorial — Etymology, Origin & Word History | Etymology Explorer