The word is ploce. Pronounced \PLOH-see\. This word is a noun, and is defined as
The repetition of a word or phrase to gain special emphasis, or to indicate an extension of meaning.
Used in a sentence: Moses was charged with the task of freeing God’s people from the hand of the Egyptians and was instructed with figures of amplification and ploce to explain who it was that sent him.
(Exodus ch.3:vs 13-14)