Fid

Okay kiddo, so fid is a word that means something like a little tool that people who work on boats or ships use to help tie knots.

When people tie knots on a boat, they need to be really careful that they tie them tightly and securely so that things don't come loose and cause problems. A fid helps with this because it's a little stick or rod that they can use to push and pull the ropes in just the right way to make the knot really tight.

Fids can be made out of all different kinds of materials, like wood, metal, or even plastic. And they come in lots of different sizes too, depending on the size of the rope they're going to be working with.

So, to sum it up, a fid is a special little tool that helps people tie knots on boats by making them really tight and secure.