Systemic relations of lexicalized prepositional declensional word forms of adverbial character

The article deals with the analysis of the systemic relations of lexicalized prepositional declensional word forms of adverbial character and with the identification of different levels of their formation / occurrence. It is proved that the systemic relations between them, on the one hand, are characterized by the same types and sorts as in the circle of the words, but on the other hand, exhibit a specific feature that distinguishes them from words and idioms.