The trait or "essence" that an individual shares with its own kind.
"Forgetfullness is an unfortunate quiddity of mine. Today whilst preparing my first ever 1word1day post I forgot to check back on pervious entries to make sure it was not a reapeat."
From the latin quid meaning what or whatness.
Hi word nerds! So please excuse my first post in which I'd accidentally posted a word already on this lovely community. If you didn't see my intial post here's a link to nerdfury's previous post. The two words are very closely linked, especially in philosophical terms, which is why I chose this as a substitute. Enjoy the rest of your week!