This article highlights the essence of the lexical integrity principle, which prioritizes words in formal-functional linguistics, and its realization at the syntactic level. The direct or indirect influence of a word, as a structural element, on sentence formation—either by acting as a center that unites specific components around itself or as an extender fulfilling an enclosing function—is examined. The incorporation of words into morpho-syntactic relations as crucial morphemes in universal syntactic connections, the status of [Pm] which grants potential sentence status to any [W], and the foundation this valency lays for the hierarchical relationship known as center-periphery in formal-functional linguistics are analyzed using examples. The study also demonstrates how the Universal Dependency (UD) approach contributes to the development of a flexible system adaptable to multiple languages, using syntactic units in Uzbek as a case study. This theory is scientifically substantiated not only for its role in facilitating natural language understanding through computational means but also for serving as a valuable resource for comprehensive linguistic research.
lexical integrity, universal dependency (USB/UD), head-dependent relations, sentence and word expanders.