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Inflection is the process of adding inflectional morphemes that modify a verb's tense, mood, aspect, voice, person, or number or a noun's case, gender, or number, rarely affecting the word's meaning or class. Examples of applying inflectional morphemes to words are adding -s to the root dog to form dogs and adding -ed to wait to form waited.
Derivational morphology changes both the meaning and the content of a listeme, while inflectional morphology doesn't change the meaning, but changes the function. A non-exhaustive list of derivational morphemes in English: -ful, -able, im-, un-, -ing, -er. A non-exhaustive list of inflectional morphemes in English: -er, -est, -ing, -en, -ed, -s.
Inflectional morphemes modify the tense, aspect, mood, person, or number of a verb or the number, grammatical gender, or case of a noun, adjective, or pronoun without affecting the word's meaning or class (part of speech). Examples of applying inflectional morphemes to words are adding -s to the root dog to form dogs and adding -ed to wait to ...
Some languages are isolating, and have little to no morphology; others are agglutinative whose words tend to have many easily separable morphemes (such as Turkic languages); others yet are inflectional or fusional because their inflectional morphemes are "fused" together (like some Indo-European languages such as Pashto and Russian). That leads ...
Thus, the word do, consisting of a single morpheme, is a verb, as is the word redo, which consists of the prefix re-and the base root do. However, there are a few prefixes in English that are class-changing in that the word resulting after prefixation belongs to a lexical category that is different from the lexical category of the base.
The root morpheme is the primary lexical unit of a word, which carries the most significant aspects of semantic content and cannot be reduced to smaller constituents. [3] The derivational morphemes carry only derivational information. [4] The affix is composed of all inflectional morphemes, and carries only inflectional information. [5]
Affixes are bound by definition. [5] English language affixes are almost exclusively prefixes or suffixes: pre-in "precaution" and -ment in "shipment". Affixes may be inflectional, indicating how a certain word relates to other words in a larger phrase, or derivational, changing either the part of speech or the actual meaning of a word.
Therefore, morphology in synthetic languages is more important than syntax. Most Indo-European languages are moderately synthetic. There are two subtypes of synthesis, according to whether morphemes are clearly differentiable or not. These subtypes are agglutinative and fusional (or inflectional or flectional in older terminology).