What does the ancient word geo mean?

The ancient word "geo" comes from the Greek word "γη" (ge), which means earth.

This root is found in many words related to the Earth, like:

* Geography: The study of the Earth's surface, its features, and inhabitants.

* Geology: The study of the Earth's structure, composition, and history.

* Geophysics: The study of the Earth's physical properties and processes.

* Geodesy: The science of measuring and mapping the Earth's surface.

So, whenever you see "geo" in a word, it usually indicates a connection to the planet Earth.