Indefinite pronouns 
Indefinite pronouns are words which replace nouns without specifying which noun they replace.
The following are kinds of indefinite pronouns.

1. Someone/somebody (unspecified or unknown person)

Example :

Clearly somebody murdered him. It was not suicide.

2. everyone/everybody (as a function all people)

Example :

We can start the meeting because everybody has arrived.

3. Anybody/anyone (no matter what person)

Example :

Can anyone answer this question?

4. Anything (no matter what thing)

Example :

The doctor needs to know if you had eaten anything in the last two hours.

5. Everything (all thing)

Example :

They had no house or possession. They lose everything in the earthquake.

6. Something (unspecified or unknown thing)

Example :

I just heard something what could it be.

7. Nobody/ no one (no person)

Example :

Nobody care about me.

8. Nothing

Example :

If you don’t know be answer. It’s the best to say nothing.

Besides it, none is also considered as an indefinite pronoun. It means not any. It is negative form of some.

Examples :

None of these proposals are yours.

Harry has some rabbits, but Andy has none.