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Noun: trunnel  trú-n(u)l
  1. A wooden peg that is used to fasten timbers in shipbuilding; water causes the peg to swell and hold the timbers fast
    "The shipwright used trunnels to secure the planks to the frame of the wooden vessel";
    - treenail, trenail

Derived forms: trunnels

Type of: nog, peg

Encyclopedia: Trunnel