bulwark bulwark /ˈbʊlwɝk/

noun

1. A protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away  ( bulwark , groin , groyne , breakwater , jetty , mole , seawall )
   a protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away
    The jetty was badly damaged in the storm, and had to be rebuilt
   The jetty was badly damaged in the storm, and had to be rebuilt
   
   
2. A fencelike structure around a deck (usually plural)  ( bulwark )
   a fencelike structure around a deck (usually plural)
   
3. An embankment built around a space for defensive purposes  ( bulwark , wall , rampart )
   an embankment built around a space for defensive purposes
    They stormed the ramparts of the city
   they stormed the ramparts of the city
    They blew the trumpet and the walls came tumbling down
   they blew the trumpet and the walls came tumbling down
   
   

verb

1. Defend with a bulwark  ( bulwark )
   defend with a bulwark