Ключевые слова: abstract, background, barb, barbed, barbwire, barrier, black, border, boundary, convict, crime, danger, defense, fence, flare, forbidden, freedom, imprison, iron, jail, keep, metal, military, nature, old, pattern, penitentiary, prevent, prison, prisoner, private, protect, protection, razor, safety, secure, security, sharp, silhouette, sky, steel, sun, sunset, symbol, wall, war, wire, wired, yellow, zone,