What is the prefix and suffix of imperious?

The word "imperious" doesn't have a clear prefix and suffix in the traditional sense. It's derived from the Latin word "imperium", which means "command" or "power".

Here's how you can break down the word:

* "Im-" is not a true prefix in this case. It's a part of the Latin root word "imperium".

* "-ous" is the suffix that means "full of" or "characterized by".

Therefore, "imperious" means "characterized by command or power". It's better understood as a word with a single root, "imperium", and a suffix.