Returning to the same word, the same phrase or the same construction, at the beginning of successive verses or sentences (anaphora) or throughout the text, to give rhythm, emphasis or insistence.
In Othello
Reputation, reputation, reputation! O, I have lost my reputation!
"Reputation" is said three times in a row and once more in the final exclamation. The insistence shows a man who can only pronounce the word of his loss, as if nothing else fit into his grief.
Act II: Cyprus, the storm and Cassio's fall, Cassio
Honest, my lord? [...] Honest. Ay, honest.
Act III: The temptation and the handkerchief, Iago and then Othello
Your wife, my lord; your true / And loyal wife.
Act IV: Humiliation and the willow song, Desdemona
Not to pick bad from bad, but by bad mend!
Act IV: Humiliation and the willow song, Desdemona
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