Here's how it works:
* Courage: This word refers to the quality of being brave and fearless. It's a noun that describes a characteristic.
* Courageous: This word describes someone or something that possesses the quality of courage. It's an adjective that modifies another noun, like "a courageous soldier" or "a courageous act."
So, the "-ous" suffix transforms the meaning from having the quality of courage to being brave and fearless.