A morphological device which involves the copying of the whole or part of a word, sometimes with minor alterations. Reduplication is used for a wide variety of purposes. Some examples:

• verb tense Ancient Greek λύω ˈluo – λέλυκα ˈleluka, I free – I have freed
• emphasis Modern Standard Chinese 小小的 ɕjáuɕjǎudə, very small
• diminutives Māori ˈweɾa – ˈweɾaˈweɾa, hot – warm