Derivational morphology
Encyclopedia
Derivational morphology
Morphology (linguistics)
In linguistics, morphology is the identification, analysis and description, in a language, of the structure of morphemes and other linguistic units, such as words, affixes, parts of speech, intonation/stress, or implied context...

changes the meaning of words by applying derivations. Derivation
Derivation (linguistics)
In linguistics, derivation is the process of forming a new word on the basis of an existing word, e.g. happi-ness and un-happy from happy, or determination from determine...

 is the combination of a word stem with a morpheme
Morpheme
In linguistics, a morpheme is the smallest semantically meaningful unit in a language. The field of study dedicated to morphemes is called morphology. A morpheme is not identical to a word, and the principal difference between the two is that a morpheme may or may not stand alone, whereas a word,...

, which forms a new word, which is often of a different class. For example, develop becomes development, developmental or redevelop.

The suffix -ation converts the verb
Verb
A verb, from the Latin verbum meaning word, is a word that in syntax conveys an action , or a state of being . In the usual description of English, the basic form, with or without the particle to, is the infinitive...

 nationalize, into the derived noun
Noun
In linguistics, a noun is a member of a large, open lexical category whose members can occur as the main word in the subject of a clause, the object of a verb, or the object of a preposition .Lexical categories are defined in terms of how their members combine with other kinds of...

 nationalization.
The suffix -ize converts the noun plural, into the verb pluralize.

Nominalization
Nominalization
In linguistics, nominalization or nominalisation is the use of a verb, an adjective, or an adverb as the head of a noun phrase, with or without morphological transformation...

is a common kind of derivation in English, and it involves forming new nouns from verbs or adjectives, by adding suffixes to them, for example:
Suffix Verb/adjective Derived noun
-ness happy (A) happiness
-ee employ (V) employee


The study of derivational morphology can be quite complicated, as the classes of words that an affix apply to are not always clearcut. For example, the suffix -ee cannot be added to all verbs, i.e. to add it to run (V) gives runee, which is clearly not an English word.
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