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]
(..) I got something you ought to see. The Mark torpedo. Taken out of service years ago. Travels at knots. Has a range of miles. Where did you get that thing? The last sub I was on was decommissioned. (..)2002 Shark Attack 3: Megalodon
(..) - We were lucky! We were very lucky. It's fast. What's our speed? We're barely keeping pace at knots. Ben: Oh no! Faster. It's headed for that boat. All right, bro'! Muy bien! (..)2002 Shark Attack 3: Megalodon