renunciation n.

late 14c., renouncen, "give up (something, especially to another), resign, surrender," from Old French renoncier "give up, cede" (12c., Modern French renoncer) and directly from Latin renuntiare "bring back word; proclaim; protest against, renounce," from re- "against" (see re-) + nuntiare "to report, announce," from nuntius "messenger" (from PIE root *neu- "to shout").

The sense of "abandon, discontinue" (a habit, practice, etc.) is from late 15c.. That of "disclaim relationship with or allegiance to" a person is by c. 1500. That of "to abandon or give up" a belief, opinion, etc. by open recantation, declare against" is from 1530s. Related: Renounced; renouncing; renouncement.

Renounce, to declare strongly, with more or less of formality, that we give up some opinion, profession, or pursuit forever. Thus, a pretender to a throne may renounce his claim. Recant, to make publicly known that we give up a principle or belief formerly maintained, from conviction of its erroneousness ; the word therefore implies the adoption of the opposite belief. [Century Dictionary]