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Use "gunports" in a sentence
"Greensides, close to the top of Leith Walk, was fifteen years old, slabbed with obsolete fortification, pocked with likewise redundant gunports, and still referred to as ‘the new station’."
"Along the parapet walls, rectangular gunports, about twelve inches tall, were cut into the three-foot-thick mud -- large enough to accommodate the swing of a rifle barrel at any advancing hordes below."
"The story of the Vasa is unfortunately a short one, she was built , she set sail and on her maiden voyage she capsized due to water coming in the open gunports on the lower deck."