The project has been tied up in political and legal 'knots' for years. [=nothing has happened with the project for years because of political and legal problems]
The mayor 'tied himself in knots' answering a touchy political question. [=he answered it in a confused or unclear way]
She 'knotted' a sweater around her shoulders. [=tied the sleeves of the sweater together around her shoulders]
(..) The bigger cities are the worst off. The airlines were the perfect delivery system. Carnival cruise vessel Dream has been given permission to join. Twenty seven knots south and closing. How soon are they showing symptoms after contact? The provisional government currently considers (..)2013 World War Z