The article is dedicated to the analysis of occasionalisms in E.G. Vodolazkin's novel "Lavr" as a key element of the author's idiolect, representing the religious-philosophical discourse through the synthesis of archaic and postmodern linguistic strategies. The object of the study is the occasionalisms in E.G. Vodolazkin's novel "Lavr" as a linguopoetic phenomenon, while the subject of the research is their structural-semantic features and functional role in constructing the religious-philosophical discourse. The aim of the study is to identify the structural-semantic characteristics of occasional units, their role in the architecture of the text, and the transmission of worldview attitudes, which allows uncovering the mechanisms of language transformation into a tool of theological reflection. The key focus is on the multi-level classification of occasionalisms, revealing their systemic interaction: lexical-semantic (recontextualization, for example, "twofoldness"), morphological (archaic suffixes — "Rukinets"), syntactic (violation of agreement norms), and graphic (metatextual markers, for example, parentheses). The methodology combines linguistic-stylistic analysis of word formation models, taxonomies of occasionalisms based on N.G. Babenko's criteria with the addition of graphic types, as well as the interpretation of linguistic neologisms in the context of religious symbolism. The scientific novelty of the work lies in the interpretation of linguistic deformation as a mechanism of philosophical modeling, where occasionalisms transform the text into a space for dialogue between the material and the spiritual ("woodenness" as a symbol of asceticism), the historical and the eternal (allusions to the martyr canon of Trifon), language and metaphysics (the wordplay "kalachnik/kulachnik" as semantic deconstruction). During the study, it was established that occasionalisms perform a dual function: archaization (for example, "theologize," "child-loving") links the text to the church tradition, while neologization ("spiritual fall," "time counting") actualizes philosophical themes — eternity, metamorphosis, transcendence. The conclusions emphasize that the synthesis of tradition and innovation in occasionalisms forms the unique idiolect of E.G. Vodolazkin, where the language game becomes a tool for reflection on existential boundaries and opens up new perspectives for interdisciplinary dialogue between linguistics, theology, and cultural anthropology in contemporary prose.