Neat...what a special word.
Theirs - Theirs is the third person plural possessive pronoun – it replaces their + noun.
The idea that theirs needs an apostrophe comes out of the fact that on virtually every other word, ‘s indicates possession, so English speakers sometimes think theirs should be spelled their’s. However, this is always incorrect – theirs is the only correct spelling.
Everything you wanted to know about em...
[https://www.thoughtco.com/third-person-pronouns-1692467]
The idea that theirs needs an apostrophe comes out of the fact that on virtually every other word, ‘s indicates possession, so English speakers sometimes think theirs should be spelled their’s. However, this is always incorrect – theirs is the only correct spelling.
Everything you wanted to know about em...
[https://www.thoughtco.com/third-person-pronouns-1692467]
