Abstract: The purpose of the study is to analyze the degrees of adverbialization of the "winter" substantive formations in peripheral adverbs. The relevance of the work is due to the need to study peripheral zones in the grammatical structure of the Russian language, explicating syncretic language units at different stages of intercategory transposition. The novelty of the approach consists in using the methods of oppositional analysis and indexing the degrees of adverbialization of nouns, which made it possible to minimize the element of subjectivism in the evaluation of adverbializing word forms in typical contexts. General scientific and general linguistic, special methods of material analysis (comparison, generalization, descriptive method, elements of component, distributive and transformational analysis) are also used in this research. The focus is on word forms such as "in winter" demonstrates that different circumstances interacts differently with nouns and adverbs. The study of the degrees and limits of their functional adverbialization showed that in the structure of substantive adverbs like "in winter", signs of nouns and adverbs are synthesized in different proportions. It is established that as a result of the grammatical transposition into the class of temporal adverbs, the word form "in winter" reveals 4% correspondence of differential signs of the original noun "winter (winter)" and 78% compliance with the substantive adverb meaning of "sometimes". The zone of the periphery of adverbs serves as the limit of categorical transformation for the forms of the nouns "in winter", "in spring", "in summer", "in autumn", which do not violate the semantic identity of the original substantive lexemes.
The results of the research can be used in the further development of the problem of transitivity and syncretism in the field of significant and official parts of speech, in the creation of a transpositional grammar of the Russian language and in lexicographic practice – when writing dictionaries of interparticle homonyms.