Do an internet search for the term “viscosity”, and you’ll find a variety of definitions for the word. For example:
CSC Scientific Blog
One of the ways to describe surface tension in fluids is: the property of a liquid’s surface that resists force. It serves as a barrier to foreign materials and holds the liquid together. This ever-present property is caused by unbalanced forces on surface molecules that pull toward the main part of the liquid.
Topics: Surface Tension Measurement, Surface Tension, duNouy Rings, Wilhelmy Plates, Tensiometer, Interfacial Tensiometer, Automatic Surface Tension Measurment, Fisher Tensiomat, Liquid Properties, Automatic Digital Tensiometer, Digital tensiometer