ploce
[ PLOH-see ]
Definition: repetition of a word or phrase to gain special emphasis or indicate an extension of meaning.
– noun
the repetition of a word or phrase to gain special emphasis or to indicate an extension of meaning, as in Ex. 3:14: “I am that I am.”

Examples:
When Taylor was educated in England and at Harvard, he was required to study the standard rhetorical handbooks of his time. There he found examples of such figures or tropes as synecdoche, metonymy, meiosis, amplification, ploce , polyptoton, etc., all designed to enhance the style of the would-be poet and preacher.
– Edited by Everett Emerson, Major Writers of Early American Literature , 1976
Syntactic changes, repetition of key words ( ploce ), and special connotations imparted to certain words through manipulation of the sounds of Korean help the reader experience the manifold significance of the narrative situation.
– Edited by Peter H. Lee, Modern Korean Literature , 1990