Ключевые слова: abstract, army, barb, barbed, barbwire, barrier, black, border, boundary, chain, closed, construction, crime, danger, dangerous, desert, design, farm, fence, freedom, guard, horizontal, iron, isolated, isolation, jail, keep, law, metal, military, nobody, old, prevent, prison, prisoner, private, protection, razor, safety, sand, secure, security, shape, sharp, sign, silhouette, sky, steel, summer, symbol, system, war, warning, white, wire,