bulwark

n.壁垒；保障；防波堤v.(复) bulwarks:（船的）舷墙.sp.用堡垒防护过去式：bulwarked过去分词：bulwarked现在分词：bulwarking第三人称单数：bulwarksbulwark英英释义Nounan embankment built around a space for defensive purposes;"they stormed the ramparts...