hub

hub is a Noun

Definition:

[1] The central part, usually cylindrical, of a wheel; the nave. See Illust. of Axle box.

[2] The hilt of a weapon. Halliwell.

[3] A rough protuberance or projecting obstruction; as, a hub in the road. [U.S.] See Hubby.

[4] A goal or mark at which quoits, etc., are cast.

[5] A hardened, engraved steel punch for impressing a device upon a die, used in coining, etc.

[6] A screw hob. See Hob,

[7] A block for scotching a wheel. Hub plank (Highway Bridges), a horizontal guard plank along a truss at the height of a wagon-wheel hub. -- Up to the hub, as far as possible in embarrassment or difficulty, or in business, like a wheel sunk in mire; deeply involved. [Colloq.]