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  1. reef knot

    • IPA[ˈrēf ˌnät]

    美式

    • n.
      a square knot, originally used for reefing sails.
    • noun: reef knot, plural noun: reef knots

    • 更多解釋

    英式

    • n.
      a type of double knot which is made symmetrically to hold securely and cast off easily.

    Oxford Dictionary