treenail Meaning, Definition & Usage

  1. noun a wooden peg that is used to fasten timbers in shipbuilding; water causes the peg to swell and hold the timbers fast
    trenail; trunnel.

WordNet

Tree"nail` noun
Etymology
Tree + nail.
Definitions
  1. (Shipbuilding) A long wooden pin used in fastening the planks of a vessel to the timbers or to each other. Written also trenail, and trunnel.

Webster 1913