In separable relation or intimate relation is called as Samavaya. There are intimate relations between Dravya (matter) and its Guna (property) like wise Dravya (matter) and its Karma (function) have. "These relation do not break until the substance exist. So the Samavaya (intimate relation) is called as Nitya (not destroyable). e.g. Sweetness of sugar is the Samvaya relation between sugar and sweetness.