A person or ship that participates in a blockade to prevent others from entering or leaving an area.
From 'blockade' plus the agent suffix '-er', creating 'one who blockades.' This occupational noun emerged in naval contexts during the 17th-18th centuries.
Blockaders were the enforcers of economic warfare—a single ship could starve a city by controlling trade, making them crucial to naval strategy long before modern wars.
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