What does the prefix -ology mean?

The prefix "-ology" comes from the Greek word "logos," meaning "word," "speech," "reason," or "study." Therefore, "-ology" generally means "the study of" or "a branch of knowledge."

For example:

* Biology is the study of life.

* Psychology is the study of the mind.

* Geology is the study of the Earth.

It's important to note that "-ology" is not always used in a literal sense. Sometimes, words with "-ology" can refer to a particular group of people, a set of beliefs, or a specific area of expertise.