Repetition

Returning to the same word, the same sentence, or the same construction, at the start of verses or successive sentences (anaphora) or throughout the text, to give rhythm, emphasis, or insistence.

In The Posthumous Memoirs of Brás Cubas

the cancer is indifferent to the virtues of the subject; when it gnaws, it gnaws; gnawing is its trade

"Gnaws, gnaws; gnawing" returns to the same verb three times in the same sentence, as the cancer returns to the same gesture, and the insistence of the sound gives physical weight to the evil that consumes the mother.

Chapters XVII to XXIV: Coimbra and His Mother's Death, the narrator

That was, I think, the high point of our love, the peak of the mountain, from which for some time we looked out [...] and above us the calm, blue sky. Once we had rested a while, we began to descend the slope, hands clasped or loose, but descending, descending...

Chapters LXXVII to LXXXVII: The Presidency and the Peak of the Mountain, the narrator