Chiunque is both an indefinite pronoun and a relative pronoun, which means it is a double, or mixed pronoun. Chiunque is invariable.
Chiunque can mean anyone, anybody, whomever, whoever, anyone who, or anybody who depending on the context. Used as a mixed or double pronoun, chiunque substitutes the phrases tutti/e quelli/e che (all those who/that) and qualunque persona che (any person who/that) .
Chiunque can mean anyone, anybody, whomever, whoever, anyone who, or anybody who depending on the context. Used as a mixed or double pronoun, chiunque substitutes the phrases tutti/e quelli/e che (all those who/that) and qualunque persona che (any person who/that) .