indefinite relative pronoun
a relative pronoun without an antecedent, as whoever in They gave tickets to whoever wanted them.
5 Relative Pronouns That We Use Every DaySpoilers: We’ll be diving into who vs. whom in this one! The first thing we should mention is that relative pronouns introduce relative clauses. A relative clause is a type of dependent clause (a clause that can’t stand by itself as a complete sentence). It adds extra information to a sentence. The five relative pronouns are who, whom, whose, which, and that. Who vs. Whom …
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019