Вплив мовної політики доби тоталітаризму на граматичні норми української літературної мови

The article illustrates the destructive influence of language policy in the era of totalitarianism on the grammatical system of the Ukrainian literary language on the example of the endings of the genitive case of singular nouns in the 3rd declension. According to the “Ukrainian orthography” of various years of publication, we can trace the norm of using the endings of the genitive case of singular nouns of the 3rd declension over the past 100 years. The elimination of the ending ‐u from the grammatical system of word change of nouns of the 3rd declension in 1933 was recorded. This gives reasons to qualify this ending as repression. Founding on the historically determined regularities of the development of the grammatical system of the Ukrainian language, the need to return the ending ‐u to the edition of “Ukrainian orthography” in 2019 was justified. It was established that despite the democratization of society, the tendency towards the revival of national identity, the desire of Ukrainian‐oriented speakers to establish and return the specific foundations of Ukrainian literary languages, the re‐codification of the ending ‐и in the 21st century could not restore its active use in language practice. Based on the results of a questionnaire, we found out the main reasons for the non‐observance of the returned morphological norm by modern speakers. We concluded as to the disastrous consequences of the grammatical heritage formed in the Soviet period on the language practice of the third millennium. Ways to improve this situation are proposed.