hob /ˈhɑb/
 滾刀,鐵架
 Hob n.
 1. The hub of a wheel. See Hub.
 2. The flat projection or iron shelf at the side of a fire grate, where things are put to be kept warm.
 3. Mech. A threaded and fluted hardened steel cutter, resembling a tap, used in a lathe for forming the teeth of screw chasers, worm wheels, etc.
 4. A peg, pin, or mark used as a target in some games, as an iron pin in quoits; also, a game in which such a target is used.
 Hob, n.
 1. A fairy; a sprite; an elf. [Obs.]
 From elves, hobs, and fairies, . . .
 Defend us, good Heaven !   --Beau. &  FL.
 2. A countryman; a rustic; a clown. [Obs.]
 Hob, n. Zool. The male ferret.
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 hob
      n 1: (folklore) a small grotesque supernatural creature that
           makes trouble for human beings [syn: goblin, hobgoblin]
      2: (folklore) fairies that are somewhat mischievous [syn: elf,
          gremlin, pixie, pixy, brownie, imp]
      3: a hard steel edge tool used to cut gears
      4: a shelf beside an open fire where something can be kept warm
      v : cut with a hob
      [also: hobbing, hobbed]