Here's why:
* Burg: This root comes from the Proto-Germanic word "*burgaz*", meaning "fort" or "fortified place". It's the basis for many English words, including:
* Burrow: A hole in the ground used as a shelter.
* Burglar: Someone who breaks into a building to steal.
* Burgundy: A region in France that was once known for its fortified castles.
While other words like "shield" or "safe" have connotations of protection, "burg" specifically refers to a physical place designed for protection.