#crease__fold__plication__flexure__crimp__bend  an angular shape made by folding
  supertype:  #angular_shape__angularshape__angularity  a shape having one or more sharp angles
  subtype:  #pleat__plait  any of various types of fold formed by doubling fabric back upon itself and then pressing or stitching into shape
     subtype:  #box_pleat__boxpleat  a flat double pleat made by folding under the fabric on either side of it
     subtype:  #inverted_pleat  a box pleat reversed so that the fullness is turned inward
     subtype:  #kick_pleat  pleat in back of a straight skirt to allow ease in walking
     subtype:  #knife_pleat__knifepleat  a single pleat turned in one direction
        subtype:  #sunburst_pleat__sunray_pleat  knife pleat cut on the bias to produce a flared effect
     subtype:  #tuck  a narrow flattened pleat or fold that is stitched in place
        subtype:  #dart  a tapered tuck made in dressmaking
  subtype:  #kink__twist__twirl  a sharp bend in a line produced when a line having a loop is pulled tight
  subtype:  #pucker__ruck  an irregular fold in an otherwise even surface (as in cloth)

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