What is the term for the repetition of words derived from the same root?

The term for the repetition of words derived from the same root is polyptoton. This literary device occurs when a root word is repeated in different forms to create emphasis or stylistic effects, often enhancing the meaning or emotional impact of the language used. For example, using "strong," "strength," and "stronger" in the same sentence showcases polyptoton by varying the forms of the root word while maintaining a connection to the central theme or idea.

In contrast, alliteration refers specifically to the repetition of the initial consonant sounds in closely placed words, which serves to create rhythm or enhance the musical quality of language. Anaphora is the repetition of a word or phrase at the beginning of successive clauses or lines, often utilized to build up emotional momentum or emphasize a particular concept. Repetition is a broader term that simply refers to repeating words or phrases but does not specifically denote the derived forms of a single root. Thus, polyptoton is the most precise term for the described repetition.