IPA: /prəˈmʌlɡeɪtə/
KK: /prəˈmʌlɡeɪtər/
A person who makes something known to many people, especially by publishing or announcing it.
The promulgator of the new law held a press conference to explain its benefits.
Promulgator → It is formed from "promulgare" (meaning to make known or publish) and the suffix "-tor" (meaning one who). The word "promulgator" refers to one who makes something known or publishes it.
Think of someone who 'makes known' ('promulgare') information — that's why a promulgator is someone who publishes or announces something.