The Greek indefinite pronoun tis/ti is one of the most frequent and grammatically flexible words in the New Testament, quietly doing essential work in nearly every chapter. As an enclitic (unstressed) form, it contrasts with the accented interrogative tis ('who?'), and this stress distinction carries real semantic weight. In its substantive use it creates the anonymous figures who populate the Gospels — 'a certain man,' 'someone in the crowd,' 'a certain woman' — giving narrative texture without requiring names. The multilingual evidence shows how differently languages handle indefiniteness: Spanish alguien/algo, German jemand/etwas, Korean 어떤 사람/무엇, and Arabic ahadun/shay'an all split the person/thing distinction that Greek tis leaves grammatically ambiguous, resolved only by gender and context. Luke especially favors tis as a storytelling device, introducing parable characters with 'a certain man had...' (Luke 15:11; 16:1, 19).