Medieval women’s mysticism is characteristic to the European Middle Ages literature where there is a certain number of Italians. The authors’ desire to describe her own mystical experience as correctly as possible raise the problem of “expressing the inexpressible”, which results in using of characteristic linguistic means, stylistic as lexical. On the example of the texts of Angela da Foligno, Catherine of Siena and Catherine of Genoa, the article presents some of linguistic peculiarities of Italian medieval women’s mysticism: stylistical (the use of intentional tautologies, similarities, parabolas, metaphors, lithotes), and lexical (the use of courtesy and love lexis, as well as lexis related to the themes of motherhood, divine nursing, blood, nutrition and purification).