What term describes fabric that is completely resistant to water?

The term that accurately describes fabric that is completely resistant to water is "waterproof." This term indicates that water cannot penetrate the material, making it suitable for use in environments where exposure to moisture is expected. Waterproof fabrics are designed with specific technologies or coatings that prevent water from seeping through, keeping the wearer dry and comfortable in wet conditions.

In contrast, other terms such as "water-resistant" refer to materials that can resist the penetration of water to a certain degree but are not entirely impervious to it. "Hydrophobic" describes a property of materials that repel water, but it does not guarantee complete waterproofness. Meanwhile, "aqueous" refers to something that is water-based and does not relate to the water resistance of fabrics. These distinctions highlight why waterproof is the most appropriate term for fabric that is entirely resistant to water.