Themselves-Theirselves | Commonly Confused Words

Themselves

/ðəmˈselvz/

Used to refer to a group of people or things previously mentioned, emphasizing their own actions or existence

The girls have one room to themselves.They were all giggling and enjoying themselves tremendously.People like to talk about themselves.

This word has no antonyms

A non-standard plural reflexive form used for 'themselves', referring to a group of people or animals.

Themselves is the standard form used in English.
Theirselves is a nonstandard form and is considered incorrect in formal writing.
Themselves is used by most people and is accepted in both spoken and written English.
Remember them is part of themselves, whereas their is not.
Theirselves may be heard in some dialects, but it lacks wide acceptance.