In linguistic typology, polysynthetic languages, formerly holophrastic languages, are highly synthetic languages, i.e. languages in which words are composed of many morphemes. They are very highly inflected languages. Polysynthetic languages typically have long "sentence-words" such as the Yupik word tuntussuqatarniksaitengqiggtuq which means "He had not yet said again that he was going to hunt reindeer."
The word consists of the morphemes tuntu-ssur-qatar-ni-ksaite-ngqiggte-uq with the meanings, reindeer-hunt-future-say-negation-again-third person-singular-indicative; and except for the morpheme tuntu "reindeer", none of the other morphemes can appear in isolation.
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