In linguistics, nominalization or nominalisation, also known as nouning, is the use of a word that is not a noun (e.g., a verb, an adjective or an adverb) as a noun, or as the head of a noun phrase. This change in functional category can occur through morphological transformation, but it does not always. Nominalization can refer, for instance, to the process of producing a noun from another part of speech by adding a derivational affix (e.g., the noun "legalization" from the verb "legalize"), but it can also refer to the complex noun that is formed as a result. Some languages simply allow verbs to be used as nouns without inflectional difference (conversion or zero derivation), while others require some form of morphological transformation. English has cases of both. Nominalization is a natural part of language, but some instances are more noticeable than others. Writing advice sometimes focuses on avoiding overuse of nominalization. Texts that contain a high level of nominalized words can be dense, but these nominalized forms can also be useful for fitting a larger volume of information into smaller sentences. Often, using an active verb (rather than a nominalized verb) is the most direct option.
In various languages
English nominalization Two types of nominalization occur in English. The first requires the addition of a derivational suffix to a word to create a noun. In other cases, English uses the same word as a noun without any additional morphology. This second process is referred to as zero-derivation.
Derivational morphology and nominalization Derivational morphology is a process by which a grammatical expression is turned into a noun phrase. For example, in the sentence "Combine the two chemicals," combine acts as a verb. This can be turned into a noun via the addition of the suffix -ation, as in "The experiment involved the combination of the two chemicals." There are many suffixes that can be used to create nouns. Huddleston (2002) provides a thorough list that is split into two main sections: person/instrument nominalizations and action/state/process nominalizations. An especially common case of verbs being used as nouns is the addition of the suffix -ing, known in English as a gerund.
Zero-derivation nominalization Some verbs and adjectives in English can be used directly as nouns without the addition of a derivational suffix, depending on the syntax of a sentence. Zero-derivation nominalization is also called conversion.
Stress- and pronunciation-dependent nominalization In addition to true zero-derivation, English also has a number of words which, depending on changes in pronunciation (typically syllable stress), can change functional category to either act as a noun or a verb. One such type, which is rather pervasive, is the change in stress placement from the final syllable of the word to the first syllable (see Initial-stress-derived noun).
An additional case is seen with the verb use, which has a different pronunciation when used as a noun. The nominal case of use has a word final voiceless alveolar fricative /s/, while the verbal case of use has a word final voiced alveolar fricative, /z/. Which of two sounds is pronounced is a signal, in addition to the syntactic structure and semantics, as to the lexical category of the word use in the context of the sentence.
In some circumstances, adjectives can also have nominal use, as in the poor to mean poor people in general. See nominalized adjective.
Other Indo-European languages Many Indo-European languages have separate inflectional morphology for nouns, verbs, and adjectives, but often this is no impediment to nominalization, as the root or stem of the adjective is readily stripped of its adjectival inflections and bedecked with nominal inflections—sometimes even with dedicated nominalizing suffixes. For example, Latin has a number of nominalization suffixes, and some of these suffixes have been borrowed into English, either directly or through Romance languages. Other examples can be seen in German—such as the subtle inflectional differences between deutsch (adj) and Deutsch (noun) across genders, numbers, and cases—although which lexical category came first may be moot. Spanish and Portuguese, whose o/os/a/as inflections commonly mark both adjectives and nouns, shows a very permeable boundary as many roots straddle the lexical categories of adjective and noun (with little or no inflectional difference).
Chinese In all varieties of Chinese, particles are used to nominalize verbs and adjectives. In Mandarin, the most common is 的 de, which is attached to both verbs and adjectives. For example, 吃 chī (to eat) becomes 吃的 chīde (that which is eaten). Cantonese uses 嘅 ge in the same capacity, while Minnan uses ê. Two other particles, found throughout the Chinese varieties, are used to explicitly indicate the nominalized noun as being either the agent or patient of the verb being nominalized. 所 (suǒ in Mandarin) is attached before the verb to indicate patient, e.g. 吃 (to eat) becomes 所吃 (that which is eaten), and 者 (zhě in Mandarin) is attached after the verb to indicate agent, e.g. 吃 (to eat) becomes 吃者 (he who eats). Both particles date from Classical Chinese and retain limited productivity in modern Chinese varieties. There are also many words with zero-derivation. For instance, 教育 jiàoyù is both a verb (to educate) and a noun (education). Other cases include 变化 biànhuà (v. to change; n. change), 保护 bǎohù (v. to protect; n. protection), 恐惧 kǒngjù (v. to fear; n. fear; adj. fearful), etc.
Vietnamese In Vietnamese, nominalization is often implicit with zero derivation, but in formal contexts or where there is a potential for ambiguity, a word can be nominalized by prepending a classifier. Cái, tính (indicating quality) and Sự are the most general classifiers used to nominalize verbs and adjectives, respectively. Other nominalizing classifiers include đồ (indicating object like đồ dùng, đồ chơi, đồ nghề, đồ hiệu, sometimes used a pejorative word like đồ xấu xa, đồ ăn hại) , điều , con (indicating an animal, like con gà, con chó, con kiến and can be used a pronoun), nét (indicating the portrait of something or someone, like nét đẹp, nét chữ, nét vẽ, nét ngài nở nang (The tale of Kieu)), vẻ (indicating the form or appearance of something, vẻ đẹp, vẻ bề ngoài, vẻ sang trọng) việc (indicating job, task, affair, like việc làm, việc học, việc đi lại).
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