EN
In the study, the author focuses on topics such as Jozef Ružička (1916 – 1989), one of the most important Slovak linguists in the second half of the 20th century and former director of the Ľudovít Štúr Institute of Linguistics of the Slovak Academy of Sciences, where he has been working in different periods of his career. Today, 100 years after his birth, this prominent representative of Slovak and Czechoslovak linguistics remains, for Slovak linguistics, as a model in hard work and ability to think systematically and originally.