Parole in libertà is a literary style introduced by Futurism in which the words that make up the text have no connection with each other grammatical - syntactic and are not organized into phrases and sentences. Is abolished punctuation, accents and apostrophes. The principles and rules of this literary technique have been identified and written by Marinetti in Technical Manifesto of Futurist Literature on the 11th of May, 1912 and resumed again in the Destruction of Syntax, Imagination without Strings and Words in freedom.
"Now suppose that a friend of yours has this faculty finds himself in a zone of intense life (revolution, war, shipwreck, earthquake, etc.) And starts right away to tell you his impressions. Do you know what your friend will instinctively do with his lyric, excited? He will begin by brutally destroying the syntax of his speech. Do not lose time building periods. Punctuation and the right adjectives will mean nothing. Despise carvings and nuances of language, and quickly throw you frantically nerves with visual, auditory, olfactory, according to their current pressing. The rush of steam - emotion will burst the period, the valves of punctuation and adjectival clamp. Handfuls of essential words without any formal order. The only concern of the narrator is to make all the vibrations of his ego." —Words in freedom of Filippo Tommaso Marinetti Destruction of Syntax / Imagination without Strings / Words in Freedom.
An example of the use of free speech is given by the book "Zang Tumb Tumb" by Filippo Tommaso Marinetti.