Karajá, a Macro-Jê language spoken in Central Brazil, presents a typologically uncommon device to signal relativization: stress shift. Despite its productivity, such mechanism is not mentioned in any of the previous descriptive or theoretical works dealing with Karajá grammar. In describing relativization (and subordination in general) in Karajá, this paper presents an overview of the language's grammar, including the semantic properties of postpositions (which play an essencial role in the creation of adverbial clauses, including converbs), lexical nominalization, and inflectional morphology.