鉄壁の防御態勢を築くの英語

surround with a wall in order to fortify

the action of constructing ramparts with gaps for firing guns or arrows

dike the land to protect it from water

a defensive covering or fort constructed at the end of a bridge used to protect the bridge from attack

defensive structure consisting of a movable obstacle composed of barbed wire or spikes attached to a wooden frame

The walls were fortified with bricks and topped with towers and walkways.

a barrier constructed to contain the flow of water or to keep out the sea

This wall forms the background of the stage setting

to enclose something with a fence

a deep ditch dug in the ground as a protection for soldiers

an embankment built around a space for defensive purposes

a barrier set up across a route of access to defend against attack or invasion

The Ming walls are eight to nine meters high on average.

entrenchment consisting of an additional interior fortification to prolong the defense