A ball of thread, yarn, etc.

线球。

A guide or key to the solution of a problem, plot, or mystery.

线索；引线；端绪(=clue)。

A lower corner of a square sail, or the after lower corner of a fore-and-aft sail; also, a loop at the corner of a sail.

【航】横帆的下隅；纵帆的后下角；帆角的绳环。

A loop holding the strings of a hammock.

吊床上穿绳用的金属环。

To raise or lower (the sails of a ship).

扬帆；收帆。