Naivety (also spelled naïvety), naiveness, or naïveté is the state of being naive. It refers to an apparent or actual lack of experience and sophistication, often describing a neglect of pragmatism in favor of moral idealism. A naïve may be called a naïf. Etymology. In its early use, the word naïve meant "natural or innocent", and did not connote ineptitude. As a French adjective, it is spelled naïve, for feminine nouns, and naïf, for masculine nouns. As a French noun, it is spelled naïveté.
https://en.wikipedia.org/wiki/Naivety