'Broach' may mean:
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Broach (metalwork) A metalworking tool with a series of
chisel points mounted on one piece of
steel.
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Broach (sailing) A sudden instability in the heading of a
sailboat when sailing
downwind.
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Broach (submarine) Submarines operating submerged are said to have broached the surface when a portion of the ship (such as the sail, bow, or screw) other than a mast or antenna comes out of the water. This is similar in intent, if not in 3-D direction, to the use of broach to describe instability in heading of a sailing ship.
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BROACH warhead
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Brooch (or broach):
Decorative item designed to be attached to
garments.
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Bharuch (also known as 'Broach'): A district in south
Gujarat state in
India.