Final answer:
The repetition of the word "thump" is an example of onomatopoeia.
Step-by-step explanation:
The repetition of the word "thump" in the lines from "The Weary Blues" is an example of the literary device onomatopoeia. Onomatopoeia is when a word imitates the sound it represents. In this case, the word "thump" imitates the sound of someone's foot hitting the floor.
Learn more about Onomatopoeia