防ぼう塁るいぼうるいMeanings1nounbulwark; earthwork; defensive fortificationRefers to a defensive structure, often an earthen rampart or wall, used in military contexts. The term is somewhat technical and may appear in historical or archaeological descriptions.元げん寇こうの際さいに築きずかれた防ぼう塁るいが今いまも残のこっている。