In Hungarian, there is an item of the language’s vocabulary, 'izé', that can be found probably in each Hungarian speaker’s mental lexicon. Although 'izé' has no stable semantic content, and it has practically no meaning, it can refer to any lexeme, it can substitute any part of speech and can take various suffixes. The function of this word is to help the speaker gain time in the case of a speech planning trouble. There is a new hypothesis on its etymology offered in this paper, elaborated by the authors. The paper discusses the history of this word from its first attested occurrence in 1604 up to 1950 (although 'izé' is still used in Hungarian). An analysis was carried out concerning the identification of this word, its function, and its use in various speech samples. Dictionaries, scientific papers, various texts, and databases provided the material to be analyzed, including speech samples of the 1940s and 1950s from the Hegedűs Archive.