"Nuncupative" Natural Recordings by Native Speakers
Nuncupative refers to a declaration or statement that is made in the presence of witnesses, usually used in the context of wills and testaments, meaning that the person making the declaration is doing so in the presence of witnesses, and is therefore making an official or formal announcement.
I apologize, but the word "nundinary" is not a real word in the English language. It is possible that it is a misspelling or a word that has been coined but not widely used or recognized. If you meant to type a different word, please let me know and I'll be happy to help you with its meaning.