In linguistics, a clitic is a grammatically independent and phonologically dependent word.[1] It is pronounced like an affix, but works at the phrase level. For example, the English possessive -'s is a clitic; in the phrase the girl next door’s cat, -’s is phonologically attached to the preceding word door while grammatically combined with the phrase the girl next door, the possessor.
Clitics may belong to any grammatical category, though they are commonly pronouns, determiners, or adpositions.
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A clitic that precedes its host is called a proclitic.
A clitic that follows its host is called an enclitic.
A mesoclitic appears between the stem of the host and other affixes.
A final type of clitic, the endoclitic, splits apart the root and is inserted between the two pieces. Endoclitics defy the Lexical Integrity Hypothesis (Lexicalist Hypothesis) and so were long claimed to be impossible, but evidence from the Udi language suggests that they do exist.[2] Endoclitics are also found in Pashto.[3]. In addition to Udi and Pashto, endoclitics are reported to exist in Degema.[4]
Some clitics can be understood as elements undergoing a historical process of grammaticalization:[5]
According to this model, an autonomous lexical item in a particular context loses the properties of a fully independent word over time and acquires the properties of a morphological affix. At any intermediate stage of this evolutionary process, the element in question can be described as a "clitic". As a result, this term ends up being applied to a highly heterogeneous class of elements, presenting different combinations of word-like and affix-like properties.
One characteristic shared by many clitics is a lack of prosodic independence. A clitic attaches to an adjacent word, known as its host. Orthographic conventions treat clitics in different ways: Some are written as separate words, some are written as one word with their hosts, and some are attached to their hosts, but set off by punctuation (a hyphen or an apostrophe, for example).
Although the term "clitic" can be used descriptively to refer to any element whose grammatical status is somewhere in between a typical word and a typical affix, linguists have proposed various definitions of "clitic" as a technical term. One common approach is to treat clitics as words that are prosodically deficient: they cannot appear without a host, and they can only form an accentual unit in combination with their host. The term "postlexical clitic" is used for this narrower sense of the term.
Given this basic definition, further criteria are needed to establish a dividing line between postlexical clitics and morphological affixes, since both are characterized by a lack of prosodic autonomy. There is no natural, clear-cut boundary between the two categories (since from a historical point of view, a given form can move gradually from one to the other by morphologization). However, by identifying clusters of observable properties that are associated with core examples of clitics on the one hand, and core examples of affixes on the other, one can pick out a battery of tests that provide an empirical foundation for a clitic/affix distinction.
An affix syntactically and phonologically attaches to a base morpheme of a limited part of speech, such as a verb, to form a new word. A clitic syntactically functions above the word level, on the phrase or clause level, and attaches only phonetically to the first, last, or only word in the phrase or clause, whichever part of speech the word belongs to.[6] The results of applying these criteria sometimes reveal that elements that have traditionally been called "clitics" actually have the status of affixes (e.g. the Romance pronominal clitics discussed below).
Clitics do not always appear next to the word or phrase that they are associated with grammatically. They may be subject to global word order constraints that act on the entire sentence. Many languages, for example, obey "Wackernagel's Law", which requires clitics to appear in "second position", after the first syntactic phrase or the first stressed word in a clause:
Several clitics appearing in the same position (sharing the same host) form a "clitic cluster". The relative order of clitics in a cluster is usually strictly fixed (just as affixes appear in a strict order within a single word):
English enclitics include:
English proclitics include:
The contraction n’t as in couldn’t etc. has been shown to have the properties of an affix, rather than a syntactically independent clitic.[7] In English, clitics must be unstressed, but not as a full word cannot be unstressed.
Stress also prevents cliticization as follows:
In the Romance languages, the articles and direct and indirect object personal pronoun forms are clitics. In Spanish, for example:
According to most criteria, in fact, the pronominal clitics in most of the Romance languages have already developed into affixes.[8]
There is still some debate as to whether or not this change from clitic to affix has occurred with French subject pronouns. Subject pronouns, especially, are still considered clitics as they force a topicalized reading of a coindexed XP.[9]
Some Portuguese dialects (such as that spoken in Portugal, or European Portuguese) allow clitic object pronouns to surface as mesoclitics:[10]
In the Indo-European languages, some clitics can be traced back to Proto-Indo-European: for example, *-kwe is the original form of Sanskrit च, Greek τε, and Latin -que.
Examples of some non-Indo-European languages are shown below:
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