LexicalGravity is tied to Ferdinand de Saussure because linguistic value emerges through relations, differences and positions inside a system rather than through isolated words. In Socioplastics, an operator gains gravity when it attracts other terms, stabilises nearby meanings and begins to organise a semantic field around itself. LexicalGravity is not simply popularity or repetition; it is the weight produced when a term becomes structurally necessary. The operator explains why some concepts become anchors, while others remain peripheral. Its internal companion is SemanticHardening, because lexical force requires repeated use, relational density and conceptual endurance. This genealogy draws on Saussure’s Course in General Linguistics (1983), and is developed through Lloveras’ Socioplastics Project Index (2026), https://antolloveras.blogspot.com/p/socioplastics-project-index.html.