watershed

n. 分水岭，流域

water-supply, water-table, water-tight, water-tower, water-vapour, water-wheel, water-wings, watercourse, watercress, watered silk, waterfall, waterfront, watering-can, watering-place, waterless, waterlogged, Waterloo, waterman, watermark, waterproof, waterside, waterspout, watertight, waterway, waterworks, watery, watt, wattage, wattle, wattle and daub, watts, wave, wave sth. away, waveband, wavelength, waver, waverer, waveringly, waving, wax,