fid /ˈfɪd/
 楔形的塞子支撐材;大型木釘;厚片
 Fid n.
 1. Naut. A square bar of wood or iron, used to support the topmast, being passed through a hole or mortise at its heel, and resting on the trestle trees.
 2. A wooden or metal bar or pin, used to support or steady anything.
 3. A pin of hard wood, tapering to a point, used to open the strands of a rope in splicing.
 Note: ☞ There are hand fids and standing fids (which are larger than the others, and stand upon a flat base). An iron implement for this purpose is called a marline spike.
 4. Mil. A block of wood used in mounting and dismounting heavy guns.
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