Derivational morphology in natural language processing
Derivational Morphology
Derivation is the process of creating new words from a stem/base form of a word.
- One of the most common ways to derive new words is to combine derivational affixes with root words (stems). The new words formed through derivational morphology may be a stem for another affix.
- We would say, new words are derived from the root words in this type of morphology.
- English derivation is one of the complex derivations. It is because of one or more of the following reasons;
- Less productive. That is, a morpheme added with a set of verbs to make new meaningful words cannot always be added with all verbs. For example, the base word 'summarize' can be added with the grammatical morpheme '-ation' results in a word 'summarization' whereas this morpheme cannot be added with all the verbs to make similar effects.
- Complex meaning differences among nominalizing suffixes. For example, the words 'conformation' and 'conformity' both derived from the word stem 'conform' but meanings are entirely different.
- Derivation creates different words from the same lemma.
Example:
Category
|
Stem
|
Affixes
|
Derived word
|
Target category
|
Noun
|
vapor
|
-ize
|
vaporize
|
Verb
|
Verb
|
read
|
-er
|
reader
|
Noun
|
Adjective
|
real
|
-ize
|
realize
|
Verb
|
Noun
|
mouth
|
-ful
|
mouthful
|
Adjective
|
Useful External Link: Essentials of linguistics
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- Go to Morphology in Natural Language Processing page
- Go to Inflectional Morphology page
- Go to Notes on Natural Langue Processing Home page
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