cord

A cord is more than just a piece of string; it is a flexible length of twisted fibers or wire that ties or links things together. You see it in the power *cord charging your laptop or the pull cord used to adjust window blinds. But it isn't always a rope or cable. A cord can also be a long, cord-like part of the body, such as the spinal cord or the vocal cords*. Think of something that binds things together or carries power or signals from one place to another, and you are likely thinking about a cord. Imagine a hiker securing gear with a sturdy nylon cord, or a singer resting their voice to protect their cords before a performance.

The word "cord" is remarkably versatile, stemming from its original meaning of a length of twisted fibers used for binding. In our daily lives, we most often encounter physical cords—like the *extension cord powering a lamp or the bungee cord* used for securing luggage. These items are defined by their strength and flexibility, made by twisting materials together to create a durable line.

But "cord" also appears in biology and in a few set phrases. Anatomically, it refers to cord-like structures in the body, most notably the *spinal cord, which serves as the crucial pathway between the brain and the rest of the body. We also refer to the umbilical cord*, the literal lifeline between a mother and a developing baby. This gives us the common idiom "to cut the cord," which means to sever a connection or become independent from someone you previously relied upon.

Interestingly, "cord" also serves as a specific unit of measurement in the timber industry: a "cord of wood" is a standard stack of firewood (traditionally 4 feet high, 4 feet deep, and 8 feet long). And because it sounds like "chord," it often gets mixed up with the music word—but "cord" is the one for ropes, cables, and cord-like parts of the body. Whether it is used for binding objects, carrying messages in the nervous system, or measuring firewood, a "cord" represents a link that holds things together or connects two points.