coir /ˈkɔɪ(ə)r/
  椰子殼的纖維
  Coir n.
  1. A material for cordage, matting, etc., consisting of the prepared fiber of the outer husk of the cocoanut.
  2. Cordage or cables, made of this material.
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  coir
       n : stiff coarse fiber from the outer husk of a coconut