IPA: /rɪˌnʌnsiˈeɪʃən/
KK: /rɪˌnʌnsiˈeɪʃən/
The act of giving up or rejecting something, often a belief or a claim, usually in a formal way.
His renunciation of wealth surprised everyone who knew him.
Renunciation → It is formed from "re-" (meaning back or again) and "nuntiare" (meaning to announce). The word refers to the act of announcing back or formally rejecting something.
Think of 'announcing back' ('re-') a rejection ('nuntiare') — that's why renunciation means to formally reject something.