* "Wonder": The root word "wonder" means "a feeling of amazement and admiration."
* "-ous": This suffix adds the meaning "full of" or "characterized by."
Therefore, "wondrous" means "full of wonder," or "characterized by amazement and admiration."
Here are other examples of how "-ous" works:
* Courageous: Full of courage
* Dangerous: Full of danger
* Fabulous: Full of fabulosity (meaning extraordinary or impressive)
So, the "-ous" suffix is a helpful indicator that the word describes something that is abundant in the quality implied by the root word.