pronoun. Used to indicate the one or ones belonging to them.

pronoun. His or hers.

See they.

pronoun. That which belongs to them; the possessive case of they, used without a following noun.

"Thus, in the example, "You may imagine what kind of faith theirs was," _theirs_ is a compound personal pronoun, equivalent to _their faith."

Pears  Xers  affairs  airs  ayres  

become  birthday/holiday/no-reason-whatsoever  chesterfield  cleft  confin