Polysynthetic language

In linguistic typology, polysynthetic languages, formerly holophrastic languages, are highly synthetic languages, i.e., languages in which words are composed of many morphemes (word parts that have independent meaning but may or may not be able to stand alone). They are very highly inflected languages. Polysynthetic languages typically have long "sentence-words" such as the Yupik word tuntussuqatarniksaitengqiggtuq. Except for the morpheme tuntu "reindeer", none of the other morphemes can appear in isolation. Whereas isolating languages have a low morpheme-to-word ratio, polysynthetic languages have a very high ratio. There is no generally agreed upon definition of polysynthesis. Generally polysynthetic languages have polypersonal agreement, although some agglutinative languages that are not polysynthetic, such as Basque, Hungarian and Georgian, also have it. Some authors apply the term polysynthetic to languages with high morpheme-to-word ratios, but others use it for languages that are highly head-marking, or those that frequently use noun incorporation. Polysynthetic languages can be agglutinative or fusional depending on whether they encode one or multiple grammatical categories per affix. At the same time, the question of whether to call a particular language polysynthetic is complicated by the fact that morpheme and word boundaries are not always clear cut, and languages may be highly synthetic in one area but less synthetic in other areas (e.g., verbs and nouns in Southern Athabaskan languages or Inuit languages). Many polysynthetic languages display complex evidentiality and/or mirativity systems in their verbs. The term was invented by Peter Stephen Du Ponceau, who considered polysynthesis, as characterized by sentence words and noun incorporation, a defining feature of all indigenous languages of the Americas. This characterization was shown to be wrong, since many indigenous American languages are not polysynthetic, but it is a fact that polysynthetic languages are not evenly distributed throughout the world, but more frequent in the Americas, Australia,...