IPA: /prəˈmʌlɡeɪt/
KK: /prəˈmʌlɡeɪt/
To officially announce or make something known to the public, especially a law or decree.
The government decided to promulgate the new regulations next month.
Past: promulgated
Past Participle: promulgated
Promulgate is formed from "pro-" (meaning forth) and "mulgare" (meaning to make known or to publish). The word refers to the act of making something known or public, especially laws or decrees.
Think of 'making known' ('mulgare') something 'forth' ('pro-') — that's why promulgate means to announce or publish.