Viscosity
Viscosity explained in an easy to understand way:
Imagine trying to move through a crowded room where everyone is tightly packed together. Just as you struggle to weave your way through people because they resist your movement, a fluid with high viscosity resists flowing easily. In this analogy, the crowded room represents a viscous fluid, where the density and interaction of people are like molecules in the fluid, and your difficulty in moving is akin to the fluid's resistance to flow.
Practice Version
Viscosity: A fluid's resistance to flowing. Viscosity. It is a measure of how thick or sticky a fluid is, determining how easily it moves.