Add water to the clear spirit and it turns cloudy white almost instantly — the same 'ouzo effect' reaction that turns anise spirits milky worldwide — which is why it's always served diluted in a small pitcher called an ibrik rather than poured straight.
Grapes are crushed and fermented for three weeks, distilled, then redistilled with aniseed added on the second pass, and the best batches age in clay amphoras before bottling. Zahle's riverside restaurants pour it cut roughly one part arak to two parts water over ice, alongside a spread of mezze.