silt up 1. 使淤塞 The old harbor is now all silted up. 旧港现在已完全被淤泥堵塞了。 特殊用法abrasive silt1.腐蚀淤泥clayey silt1.粘质粉土coal silt1.煤泥滓industrial silt1.工业淤泥[粉沙]river silt1.河流泥沙