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Pioneering (scout movement) is the art of using ropes and wooden spars joined by knots and lashings to create a structure. 

童子军利用绳索，以特定的结款，连接木条，筑起结构体。

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To tie the knot is to get married. In the old days, traditional Chinese weddings are not complete without the symbol of happiness, 囍, knotted by hand, in flaming red cord. It has since been largely replaced by paper-cuttings or printed stickers. 

古代传统的华人结婚礼仪少不了一对用红线手编的囍结。如今大多已被剪纸和印制贴纸所取代。

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In topology, knot theory is the study of mathematical knots. While inspired by knots which appear in daily life in shoelaces and rope, a mathematical knot differs in that the ends are joined together so that it cannot be undone, the simplest knot being a ring. 

数学科系中有一项结的理论。虽以日常生活的应用结为基础，数学结论的特点是头尾相连，无法开解。最简单的例子就是圆圈。

 

A knot of people is a group of people who are standing very close together.
 

If you feel a knot in your stomach, you get an uncomfortable tight feeling in your stomach, usually because you are afraid or excited.

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A knot in a piece of wood is a small hard area where a branch grew.​

 

A knot is a unit of speed. The speed of ships, aircraft, and winds is measured in knots.

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