What does the root word erg mean?

The root word "erg" comes from the Greek word "ἔργον" (érgon), which means work or action.

It's often used in scientific terms, particularly in physics and related fields. Here are some examples:

* Erg: The basic unit of work or energy in the metric system.

* Ergonomics: The study of how people interact with their working environment.

* Bioenergetics: The study of energy flow in living organisms.

So, whenever you see "erg" in a word, it's likely related to work, action, or energy.