The problem of derivation in phraseology
The article deals with the essence of derivational relations in the paradigm “producing phraseological unit → derived phraseological unit”. Despite the traditional understanding of phraseological unit as a stable unit, modern state of language contributes to all sorts of changes, including the changes in phraseology. In this case, the development of branch of knowledge about the development of phraseological system is of great importance, as the dynamic processes of self-development and self-motion within the language system become visible. Being the units of secondary nomination, the phraseological units continue their development and become the basis for generating new phraseological units. The process of "secondary" phrase-formation goes in two directions: external and internal phrase-formation. Despite the sufficiently developed theoretical framework, modern linguistics has not developed a unified point of view on the nature of the processes of derivation yet, there is no common understanding in terminology either. The article seeks to define the essence of the process of derivation in phraseology as a way of secondary phrase-formation, generalization and systematisation of terminological framework, to identify the opportunities of phraseological units of different classes to join the derivational relations, and to identify phrase-forming means. The identification of mechanisms and the determination of patterns and causes of this process help to create the typology of internal phrase-formation, which will help in turn to reveal the internal resources of the language. The necessity for such understanding is explained by the fact that the appearance of phraseological neologisms not only contributes to regular enrichment of modern phraseological language, but also gives particular expression to the statement.