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]
(..) It's perfect. I got the red foulard okay, didn't I? Yeah, real dark red. Burgundy, Charlie. Burgundy. They love it. Bay rum. Windsor knot. That's my heart I'm feelin'. I'm off. Can you get long distance on this? And how. Be my guest. (DIALING) (..)1992 Scent of a Woman