Ferdinand Magellan was the first person to circumnavigate the globe.

Circ= circle, um= undecided, navigate= from the navy. So it means to be undecided on
joining the navy's circus.

Circum= around, Navigate to travel. So it means to travel around the world.

Circum= circle, navigate= to use a compass to navigate. So it means to use a compass
to travel in a circle.

please hurry:/