(n.) Native simplicity; unaffected plainness or ingenuousness; artlessness.

artlessness bluffness bluntness candor childlikeness cullibility deceivability directness dupability easiness greenness guilelessness gullibility hoaxability ingenuousness innocence naiveness naivety openheartedness openness outspokenness persuadability plainness seduceability simpleheartedness simplemindedness simpleness simplicity sincerity single-heartedness single-mindedness singleness of heart softness trustfulness unguardedness unsophisticatedness unsophistication unsuspiciousness unwariness weakness