枢 - hinge, pivot, door

axle; pivot

centre; center; pivot; mainstay; nucleus; hub; backbone; central figure; pillar; key person

satiety center (of the brain)

Wernicke's area

cavities in the frame of a door used as part of a pivot hinge

sliding wooden bolt (for holding a door or window shut)

pivot hinge (using extensions on the top and bottom of a door that fit into cavities in the frame)

Axis of Evil (Iran, Iraq and North Korea)

door (with a pivot hinge)

centre of (political) power

central nervous system

central (nervous system)