naive

natural, ingenuous, naive, unsophisticated, artless mean free from pretension or calculation. natural implies lacking artificiality and self-consciousness and having a spontaneousness suggesting the natural rather than the man-made world <her unaffected, natural manner>. ingenuous implies inability to disguise or conceal one's feelings or intentions <the ingenuous enthusiasm of children>. naive suggests lack of worldly wisdom often connoting credulousness and unchecked innocence <politically naive>. unsophisticated implies a lack of experience and training necessary for social ease and adroitness <unsophisticated adolescents>. artless suggests a naturalness resulting from unawareness of the effect one is producing on others <artless charm>.

The Latin word nāscī, meaning “to be born,” and its form nātus give us the roots nat and nai. Words from the Latin nāscī have something to do with being born. When someone is native to a particular place, she or he was born there. A nation, or country, is a place where people are born. Anyone naive has a lack of knowledge and experience as if he or she was only recently born.