nunciative
/ˌnʌnsɪˈætɪv/Definitions
1. adjective
Relating to or given by nuncios, especially in a diplomatic or ecclesiastical sense.
“The nunciative nature of the ambassador’s communication made it clear that it was official business.”
2. noun
A nunciative, a person who represents the Holy See in a foreign country.
“The nunciative in Rome played a crucial role in facilitating international relations.”