What Are Indefinite Pronouns & Indefinite Adjectives?
An indefinite pronoun is pronoun that refer to person / thing replaces a noun, without being specific.
The most common indefinite pronouns are all, any , anyone, anything, each, everybody, everyone, everything, few, many, nobody, none, one, several, some, somebody and someone.

Indefinite Pronouns and Adjectives
Indefinite adjectives give nonspecific information about a noun precedes a noun or pronoun and modifies it. When you use words all, any, anyone….. , those words become Indefinite Adjectives.