"Etymological Dictionary of Slavic Languages. Proto-Slavic Lexical Stock": the Project, the Outcome, the Issues (On the 85<sup>th</sup> Birthday of Academician O.N. Trubachev)
The article presents innovative theoretical and methodological principles of O.N. Trubachev’s main project “An Etymological Dictionary of Slavic Languages. Proto-Slavic Lexical Stock”: An approach to Proto-Slavic as the Real Language of a Large People; that approach implies recognition of Proto-Slavic as a language with a well-developed word formation and dialectal division, reflected in the structure of the dictionary. This approach has determined the author’s methodology of assembling Slavic lexical data and composing the reconstructed Proto-Slavic lexicon. At present, 39 volumes of the dictionary have been published, and the 40th is prepared. The achieved results testify to the thoroughness and perspective quality of the project. One serious methodological problem in elaboration of the project is the complexity of differentiation between the Proto-Slavic lexical inheritance and the products of active derivation in Slavic daughter languages.