The word "bond" evolved from "band" through a process called metathesis, where the order of sounds in a word is changed. In this case, the "d" and "n" sounds were switched.
Here are some related words that show the connection:
* Band: A group of people united by a common purpose.
* Bind: To tie or fasten together.
* Bandeau: A strip of fabric worn as a headband.
So, the root of the word "bond" is ultimately the idea of connecting, uniting, or tying things together. This meaning is reflected in the various ways we use the word "bond" today, such as a financial bond, a bond between people, or a chemical bond.