The ability of a liquid to flow is described in terms of its:

The ability of a liquid to flow is characterized by its viscosity. Viscosity is a measure of a fluid's resistance to deformation, which indicates how thick or thin a liquid is. A liquid with high viscosity flows more slowly and is thicker (like honey), while a liquid with low viscosity flows more easily and is thinner (like water). This property is crucial in various applications, including dental practices, where the handling and application of different materials depend on their flow characteristics.

Solubility refers to the ability of a substance to dissolve in a solvent and does not pertain to the flow behavior of liquids. Density is a measure of mass per unit volume and gives no direct indication of a liquid's flow properties. Surface tension refers to the cohesive forces at the surface of a liquid that make it behave like a stretched elastic membrane and affects phenomena such as droplet formation, rather than the overall flow behavior of that liquid.