'Fortify' in the Bible

Raise up a signal flagagainst the walls of Babylon;fortify the watch post;set the watchmen in place;prepare the ambush.For the Lord has both planned and accomplishedwhat He has threatenedagainst those who live in Babylon.

Even if Babylon should ascend to the heavensand fortify her tall fortresses,destroyers will come against her from Me.This is the Lord’s declaration.