Bedouin is
Arabic for
nomad. Derived from the 3 letter root verb Ba Dal Aleph, meaning begin. Ba Dal Wow, bedo or bado, basicaly mean the same thing, but its in plural form because of the Wow at the end of the word. Bado are called bado because their way of life is premitive, basic, and as the word bado suggest, a beginer and simple way of life.
In contrast, civilian life in the city is called Hadhar, from the 3 letter root verb Ha Dhal Ra, meaning now.
If we imagine a time line, then as the words suggests, bado are at the begining of the time line and hadhar are at the end.