Final answer:
A repeating word or phrase in a poem is called a refrain and it enhances the poem's impact and theme.
Explanation:
Refrain is the term used to describe a repeating word or phrase in a poem. It adds emphasis, creates rhythm, and reinforces important themes throughout the poem. For example, in Martin Luther King Jr.'s 'I Have a Dream' speech, the phrase 'I have a dream' serves as a powerful refrain that resonates with listeners.
Learn more about Literary devices in poetry here:
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