washboard

(-bôrd′)

noun

    1. a board or frame with a ridged surface of metal, glass, etc., used for scrubbing dirt out of clothes or as a percussion instrument in a jug band
    2. the worn surface of a paved road resembling this
  1. baseboard
  2. Naut. a thin, broad plank fastened along the gunwale of a boat or on the sill of a lower deck port to keep out the sea and spray

See washboard in American Heritage Dictionary 4

noun
  1. a. A board having a corrugated surface on which clothes can be rubbed in the process of laundering.
    b. Music A similar board used as a percussion instrument.
  2. A board fastened to a wall at the floor; a baseboard.
  3. Nautical A thin plank fastened to the side of a boat or to the sill of a port to keep out the sea and the spray.

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