Axis
Pivot, Central Part
noun
すうじく
軸 （じく） Axis
中軸 （ちゅうじく） Axis, Pivot
枢軸 （すうじく） Axis, Pivot, Central Part
中枢 （ちゅうすう） Center, Centre, Pivot
An Axle 枢軸 is a physical hinge 枢 (movable joint) that connects two wheels and has an imaginary axis 軸 of rotation line that runs through it.
You sue すう Jesus じ for all his cookies く because he broke your Axle.