It's a common root found in many English words, including:
* Lithography: The process of printing from a flat surface, typically a stone.
* Monolith: A single, large stone.
* Lithosphere: The rigid outer layer of Earth, comprising the crust and upper mantle.
* Lithiasis: The formation of stones, usually in the body.
* Lithic: Relating to stone.
So, whenever you see "lith" in a word, you can usually assume it has something to do with stones or rock formations.