The suffix -ous frequently indicates that a word is an adejtive such as: adventurous, fabulous, enormous, famous, generous.
A suffixis refers to an affix which is placed after the stem of a word. Common examples are case endings, which indicate the grammatical case of nouns or adjectives, and verb endings, which form the conjugation of verbs.
Adding the suffix -ous turns a noun into an adjective. It means 'full of'.
