Repetition is built into the poem because the speaker begins every stanza by stating Miniver's name, which creates an anaphora. This enhances the poem's feeling of consistency, but it also draws attention to the absurd nature of Miniver's name. A "miniver," after all, is a white fur that lines certain kinds of fancy clothing. By repeating Miniver's name so often, then, the speaker increases the likelihood that readers will note the absurdity of this man's name—which is fitting, since Miniver clearly likes to see himself as the kind of person who would wear lavish, expensive clothing.
The speaker also uses repetition within single stanzas, often making use of anaphora to create a parallel structure between the first and second halves of a stanza. For example, the fourth stanza features the word "mourned," which appears at the beginning of the first and third lines:
Miniver mourned the ripe renown
That made so many a name so fragrant;
He mourned Romance, now on the town,
And Art, a vagrant.
In this case, the stanza's third line mirrors the construction of its first line, making it possible for the speaker to build upon the general idea by clarifying the actual things Miniver thinks have disappeared or deteriorated over time (namely, "Romance" and "Art").
The speaker uses anaphora again in lines 10 and 11:
And dreamed, and rested from his labors;
He dreamed of Thebes and Camelot,
This repetition stresses the extent to which Miniver loses himself in fantasies of the past. In this way, repetition helps the speaker depict Miniver as somebody who is out of touch with reality.
In keeping with this image of Miniver as an out-of-touch dreamer, the speaker uses both diacope and epizeuxis in lines 27 and 28:
Miniver thought, and thought, and thought,
And thought about it.
The repetition of the word "thought" is a diacope, as the speaker uses the word multiple times within the span of just two lines. The complete phrase "and thought," though, is an epizeuxis because the speaker repeats it three times in a row with no intervening words. Once again, then, the speaker's repetition accentuates Miniver's tendency toward inaction, inviting readers to consider this idle man's inability to do anything but sit there and think about his unhappiness.