When is a beverage considered chamar medina, and what should one use when wine is unavailable?

This source-based Torah study examines the question: When is a beverage considered chamar medina, and what should one use when wine is unavailable? The canonical Hebrew article develops the issue through the weekly Torah portion and the sources cited there. This localized discovery layer preserves the question and the source identity; it does not add any new halakhic, medical, legal, scientific, historical, theological, or empirical ruling or claim beyond the canonical Hebrew source.