fortification
for.ti.fi.ca.tion \.fo.rt-*-f*-'ka--sh*n\ n 1: an act or process of fortifying 2: something that fortifies, defends, or strengthens; esp : works e rected to defend a place or position
for.ti.fi.ca.tion \.fo.rt-*-f*-'ka--sh*n\ n 1: an act or process of fortifying 2: something that fortifies, defends, or strengthens; esp : works e rected to defend a place or position