unsophisticated
/ˌən-sə-ˈfi-stə-ˌkā-təd/
adjective
not sophisticated: such as
not changed or corrupted : genuine
not worldly-wise : lacking social or economic sophistication
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. ingenuous implies inability to disguise or conceal one's feelings or intentions.