semantics of phraseological units The Role of the Thematic Group «Hats» in the Formation of Russian Idiomaic System The article analyzes the degree of how productively the headwear nominations are used in Russian idiomatic system. The main principles of motivation of semantics of phraseological units by meanings of lexemes of this type have been identified. Read more about The Role of the Thematic Group «Hats» in the Formation of Russian Idiomaic System