"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 40<sup>th</sup> 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.