crin·gle /ˈkrɪŋgəl/
  索眼,索圈
  Crin·gle n.
  1. A withe for fastening a gate.
  2. Naut. An iron or pope thimble or grommet worked into or attached to the edges and corners of a sail; -- usually in the plural.  The cringles are used for making fast the bowline bridles, earings, etc.
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  cringle
       n : fastener consisting of a metal ring for lining a small hole
           to permit the attachment of cords or lines [syn: eyelet,
            loop, grommet, grummet]