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Root (linguistics)

Lexical core of a word without affixes

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The traditional definition allows roots to be either free morphemes or bound morphemes. Root morphemes are the building blocks for affixation and compounds. However, in polysynthetic languages with very high levels of inflectional morphology, the term "root" is generally synonymous with "free morpheme". Many languages have a very restricted number of morphemes that can stand alone as a word: Yup'ik, for instance, has no more than two thousand.

Roots are sometimes notated using the radical symbol ⟨√⟩ to avoid potential conflation with other objects of analysis with similar spellings or pronunciation: for instance, √bhū- specifically denotes the Sanskrit root bhū-.

Examples

English verb form running contains the root run. The Spanish superlative adjective amplísimo contains the root ampli-. In the former case, the root can occur on its own freely. In the latter, modification via affixation is required to be used as a free form. English has minimal use of morphological strategies such as affixation and features a tendency to have words that are identical to their roots. However, such forms as in Spanish exist in English such as interrupt, which may arguably contain the root -rupt, which only appears in other related prefixed forms (such as disrupt, corrupt, rupture, etc.). The form -rupt cannot occur on its own.

Examples of consonantal roots, which are related but distinct to the concept developed here, are formed prototypically by three (as few as two and as many as five) consonants. Speakers may derive and develop new words (morphosyntactically distinct, i.e. with different parts of speech) by using non-concatenative morphological strategies: inserting different vowels. Unlike 'root' here, these cannot occur on their own without modification; as such these are never actually observed in speech and may be termed 'abstract'. For example, in Hebrew, the forms derived from the abstract consonantal roots, a major Hebrew phonetics concept ג-ד-ל (g-d-l) related to ideas of largeness: gadol and gdola (masculine and feminine forms of the adjective "big"), gadal "he grew", higdil "he magnified" and magdelet "magnifier", along with many other words such as godel "size" and migdal "tower".

Roots and reconstructed roots can become the tools of etymology.

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