Cyclic changes in Hungarian relative clauses
Relative operators stem from demonstratives or from wh-operators and may subsequently be reanalyzed as complementizers. In Hungarian, unlike English, the reanalysis of wh-operators into relative operators preceded the reanalysis of the matrix demonstrative pronoun, and the demonstrative was reanalyzed into [Spec,CP] via cliticization onto the wh-based relative pronoun, rendering morphologically complex relative pronouns. This change was enabled by environments in which a morphologically unmarked (singular, nominative) matrix demonstrative was immediately followed by a relative operator. The demonstrative was subsequently renewed in the main clause. We argue that this had two important prerequisites. First, the original wh-based relative operator did not lose its lexical features and was not grammaticalized into a functional head. Second, the matrix demonstrative lost its original definiteness feature, [+def], and became unspecified for this feature. Ultimately, it is this feature change that brought about the emergence of a new morphosyntactic paradigm, in line with the Borer-Chomsky Conjecture.