ingenuousness
  率直;正直
  In·gen·u·ous·ness, n.
  1. The state or quality of being ingenuous; openness of heart; frankness.
  2. Ingenuity. [Obs.]
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  ingenuousness
       n 1: the quality of innocent naivete [syn: artlessness, innocence,
             naturalness]
       2: openly straightforward or frank [ant: disingenuousness]