A liquid-impregnated surface consists of two distinct layers. The first is a highly textured surface with features spaced sufficiently close to stably contain the second layer which is an impregnating liquid that fills in the spaces between the features.
LiquiGlide is a commercial example of a liquid-impregnated surface, invented at the Massachusetts Institute of Technology
References
Liquid-impregnated surface Wikipedia(Text) CC BY-SA