DICT.TW Dictionary Taiwan

 jamb /ˈʤæm/
 側柱;旁柱;門方;壁爐兩側的石壁

 Jamb n.
 1.  Arch The vertical side of any opening, as a door or fireplace; hence, less properly, any narrow vertical surface of wall, as the of a chimney-breast or of a pier, as distinguished from its face.
 2.  Mining Any thick mass of rock which prevents miners from following the lode or vein.

 Jamb v. t. See Jam, v. t. & i.
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 jamb
      n : upright consisting of a vertical side member of a door or
          window frame