Word: Trunnel
Part of Speech: Noun
Definition: A trunnel is a wooden peg used in shipbuilding. It is inserted into holes in timbers (the large wooden beams used in constructing ships) to hold them together. When water touches the trunnel, it swells up, making it fit tightly and securely, which helps keep the timbers fastened.
"Trunnel" is a specific noun used in shipbuilding to describe a wooden peg that helps secure timbers together.