Ключевые слова: abstract, background, bank, barrier, border, boulder, breakwater, calm, concept, construction, crag, division, erosion, frontier, granite, inlet, land, landscape, landscaping, landslide, limit, messy, metal, mud, nature, net, no, outdoor, people, protect, protection, reef, reflection, reflex, retaining, river, rock, separation, sky, soil, stack, stone, structure, texture, tissue, wall, water, waves, wire,