Trunnel, treenail, or trenail

A nice rounded West-country man’s way of saying treenail, which may also be pronounced as spelled, or as ‘trennle’. Anyway, it is a wooden spike or nail, used for holding planks to timbers, and so forth. As a fastening it is not likely to be used in private pleasure craft, being better fitted to craft of bigger size where the Scantlings give sufficient thickness for a trunnel to get a grip.