Ключевые слова: abstract, background, barb, barbed, barbedwire, barrier, black, border, boundary, cage, cloud, color, construction, copyspace, crime, criminal, danger, defense, fence, freedom, frontier, graphic, horizontal, illustration, iron, isolated, law, mesh, metal, military, nature, pole, prevention, prison, privacy, protection, razor, safety, seamless, secure, security, sharp, silhouette, steel, sunset, texture, wall, war, wire,