枢 - hinge, pivot, door

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

axle; pivot

cardinal (Catholic Church)

Privy Council (abolished in 1947)

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)

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

door (with a pivot hinge)

centre of (political) power

language center (brain); language centre

vomiting center; area postrema; part of the brain that controls vomiting