contraption contraption /kənˈtræpʃən/

noun

1. () A device or control that is very useful for a particular job  ( appliance , convenience , gismo [Informal] , contraption , contrivance , gadget , gizmo [Informal] , widget )
   a device or control that is very useful for a particular job
     The latest gadget on the market was a smartwatch.
   The latest gadget on the market was a smartwatch.