“Why do comparisons of words and tone poems (poetry and music) never take into consideration that the word is a mere signifier, but that the sound, aside from being a signifier, is also an object?”

Pedagogia do oprimido (Pedagogy of the Oppressed) (1968, English trans. 1970)

On how she favors a musical quality to her poetry in the book Truthtellers of the Times: Interviews with Contemporary Women Poets https://books.google.com/books?id=LkVO9mmfwZYC&pg=PA23&lpg=PA23&dq

How To Change the World: Reflections on Marx and Marxism (2011)

The Freudian Unconscious and Ours
The Four Fundamental Concepts of Psycho Analysis (1978)

Writing and Being (1991)
Context: In the beginning was the Word. The Word was with God, signified God's Word, the word that was Creation. But over the centuries of human culture the word has taken on other meanings, secular as well as religious. To have the word has come to be synonymous with ultimate authority, with prestige, with awesome, sometimes dangerous persuation, to have Prime Time, a TV talk show, to have the gift of the gab as well as that of speaking in tongues. The word flies through space, it is bounced from satellites, now nearer than it has ever been to the heaven from which it was believed to have come.

Pt. 4, ch. 10
De l’Allemagne [Germany] (1813)

Anarchy (1891) http://www.marxists.org/archive/malatesta/1891/xx/anarchy.htm
Context: Anarchy is a word that comes from the Greek, and signifies, strictly speaking, "without government": the state of a people without any constituted authority.
Before such an organization had begun to be considered possible and desirable by a whole class of thinkers, so as to be taken as the aim of a movement (which has now become one of the most important factors in modern social warfare), the word “anarchy” was used universally in the sense of disorder and confusion, and it is still adopted in that sense by the ignorant and by adversaries interested in distorting the truth.

Source: The Professor at the Breakfast Table (1859), Ch. V.