#worsening  changing something with the result that it becomes worse
  supertype:  change_of_state  the act of changing something into something different in essential characteristics
  subtype:  downturn__downswing  a worsening of business or economic activity; "the market took a downturn"
     subtype:  downspin  a swift and dangerous downturn

No statement uses or specializes worsening; click here to add one.