木栓
Treenail \Tree"nail`\, n. [Tree + nail.] (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}.]
treenail
n : a wooden peg that is used to fasten timbers in shipbuilding;
water causes the peg to swell and hold the timbers fast
[syn: {trenail}, {trunnel}]