What is referred to as repetition of a word or phrase at the beginning of successive phrases or clauses?

The term that describes the repetition of a word or phrase at the beginning of successive phrases or clauses is known as anaphora. This rhetorical device is effective in creating emphasis and rhythm in writing and speech, often enhancing the persuasive effect by drawing attention to a particular idea or theme. Anaphora is frequently used in poetry, speeches, and prose to create a memorable effect and to underscore a significant point.

For example, in the phrase "I have a dream" used repeatedly by Martin Luther King Jr. in his famous speech, the repetition emphasizes the vision he has for equality and justice, making the message resonate more strongly with the audience. By starting several clauses with the same words, the speaker or writer reinforces the emotional weight of the message being conveyed.