Ключевые слова: abstract, badge, blackboard, business, chalk, concept, currency, dark, defence, design, dollar, drawing, drawn, economic, finance, financial, graphic, gray, guard, icon, idea, illustration, iron, line, metal, metallic, money, preservation, preserve, protect, protection, reliability, reliable, safe, safeguard, safety, security, shadow, shield, sign, silver, silvery, solid, steel, strong, symbol,