/blɑːˈkeɪd/
the action of surrounding or closing a place, especially a port, in order to stop people or goods from coming in or out （尤指对港口的）包围，封锁
a [[naval|naval]] blockade
海上封锁
to impose/lift a blockade
实行／解除封锁
an economic blockade (= stopping goods from entering or leaving a country)
经济封锁