Here's a breakdown:

* Circum: This prefix means "around" or "surrounding."

* Navigation: This refers to the act of directing a ship or other vehicle.

* Earth: This refers to the planet we live on.

Therefore, circumnavigating the Earth means going around the entire planet, like drawing a circle on a globe.

It's important to note that:

* You don't have to travel over land: You can circumnavigate the Earth by sea, air, or even by a combination of both.

* There's no single "correct" route: You can choose your own path and still achieve a circumnavigation.

The first person to circumnavigate the Earth was Ferdinand Magellan, although he died during the journey. His crew completed the voyage in 1522. Today, many people have circumnavigated the Earth for various reasons, from exploration to adventure to setting records.