po·rous 
/ˈporəs/ adjective
/ˈporəs/ adjective [more porous; most porous] 1 : having small holes that allow air or liquid to pass through
▪ porous rock ▪ a porous membrane/surface 2 : easy to pass or get through
▪ The country has a porous border.
▪ porous rock ▪ a porous membrane/surface
▪ The country has a porous border.
— po·ros·i·ty /pəˈrɑ:səti/ noun [noncount] technical
▪ the porosity of the membrane
/pəˈrɑ:səti/ noun [noncount] technical ▪ the porosity of the membrane
