reduplication

definition: the act of repeating over and again (or an instance thereof)
example:
speech part: noun
synonyms: reiteration
definition: a word formed by or containing a repeated syllable or speech sound (usually at the beginning of the word)
example:
speech part: noun
synonyms:
definition: the syllable added in a reduplicated word form
example:
speech part: noun
synonyms:
definition: repetition of the final words of a sentence or line at the beginning of the next
example:
speech part: noun
synonyms: anadiplosis

How reduplication is being used?