#keenness__sharpness__sharpnes  thinness of edge or fineness of point
  exclusion:  #dullness.contour
  supertype:  #contour__shape__form__configuration  any spatial attribute (especially as defined by outline); "he could barely make out their shapes through the smoke"
  subtype:  #acuteness__acutenes  the quality of having a sharp edge or point

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