gav·el /ˈgævəl/
  槌
  Gav·el, n.
  1. The mallet of the presiding officer in a legislative body, public assembly, court, masonic body, etc.
  2. A mason's setting maul.
  Gav·el, n.  Law Tribute; toll; custom. [Obs.] See Gabel.
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  Gav·el, n.  A small heap of grain, not tied up into a bundle.
  Gav·el n. A gable. [Prov. Eng.]
  gavel
       n : a small mallet used by a presiding officer or a judge