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]
(..) - Very good, sir. (bells ringing) All ahead full. (Man) All ahead full ! Come on, lads. Step lively. Let's stoke them right up ! We're going full ahead ! knots, sir. Hey, look, look, look ! Look, look ! See it ? There's another one ! See him ? Look at that one ! Look at him jump ! Whoo-hoo ! (..)1997 Titanic