clap·board /ˈklæbɚ/
  護牆板,隔板,桶板(vt.)遮以護牆板
  Clap·board n.
  1. A narrow board, thicker at one edge than at the other; -- used for weatherboarding the outside of houses. [U. S.]
  2. A stave for a cask. [Eng.]
  Clap·board, v. t. To cover with clapboards; as, to clapboard the sides of a house. [U. S.]
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  clapboard
       n : a long thin board with one edge thicker than the other; used
           as siding by lapping one board over the board below [syn:
            weatherboard, weatherboarding]
       v : cover with clapboards