What is the meaning of root word -top- in words like topographer?

The root word "-top-" in words like "topographer" comes from the Greek word "topos", which means "place" or "location".

Here's how it breaks down:

* "Topo-" is a combining form derived from "topos".

* "Topographer" literally means someone who describes or maps places.

Therefore, "-top-" in this context signifies location, position, or the study of places.