Definition of treenail in English:

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Pronunciation: /ˈtriːneɪl/
(also trenail or US trunnel /ˈtrʌn(ə)l/)


A hard wooden pin used for fastening timbers together.
Example sentences
  • The timbers are often cut and dressed by hand, jointed and interlocked in the traditional way, and fastened throughout with wood pegs called trunnels, or ‘tree nails.’
  • We have used tree nails (trunnels) for frame fixing, stone ballast, and hand made rope stropped blocks.
  • Surprisingly to me, the old bridge didn't have trunnels, it was all bolted.
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