Indefinite adjectives and pronouns serve to indicate quality or quantity, but they do not refer to a specific person or thing.
Following is a list of the most commonly used Italian indefinite adjectives. These adjectives are always invariable, and they always modify a singular noun.
ogni --> every, each
Ogni volta che gioco a tennis mi diverto. Every time I play tennis, I have fun.
Ogni paragrafo deve essere ben esaminato. Each paragraph must be well examined.