noun
a barrier or obstacle that prevents movement or access
verb
to create a barrier or obstacle to prevent movement or access
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The government imposed a blockade on the port to prevent any illegal goods from entering the country.
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The protesters set up a blockade on the highway to stop traffic.
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The gang put a blockade on the street to keep their rivals out of their territory.
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Her fear of failure acted as a mental blockade, preventing her from taking any risks.