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A phonological rule is a formal way of expressing a systematic phonological or morphophonological process in linguistics.Phonological rules are commonly used in generative phonology as a notation to capture sound-related operations and computations the human brain performs when producing or comprehending spoken language.
Bleeding order is a term used in phonology to describe specific interactions of phonological rules. The term was introduced in 1968 by Paul Kiparsky. [1] If two phonological rules are said to be in bleeding order, the application of the first rule creates a context in which the second rule can no longer apply.
In phonology and historical linguistics, feeding order of phonological rules refers to a situation in which the application of a rule A creates new contexts in which a rule B can apply; it would not have been possible for rule B to apply otherwise. Suppose there are two rules. Rule A takes in input x and returns output y.
Phonology also includes topics such as phonotactics (the phonological constraints on what sounds can appear in what positions in a given language) and phonological alternation (how the pronunciation of a sound changes through the application of phonological rules, sometimes in a given order that can be feeding or bleeding, [16]) as well as ...
For example, the word "cats" has the phonemic representation /kæts/. If it is assumed that the underlying form of the English plural suffix is a [z] sound, the underlying form of "cats" would be //kætz//. (The [z] surfaces as an [s] because of the phonological process of devoicing after an unvoiced consonant.)
The phonological component of each lexical entry is considered to be a linear sequence of these feature bundles. A number of context-sensitive rules transform the underlying form of a sequence of words into the final phonetic form that is uttered by the speaker. These rules are allowed access to the tree structure that the syntax is said to output.
An example of a morphophonological alternation in English is provided by the plural morpheme, written as "-s" or "-es". Its pronunciation varies among [s], [z], and [ɪz], as in cats, dogs, and horses respectively. A purely phonological analysis would most likely assign to these three endings the phonemic representations /s/, /z/, /ɪz/.
According to Paul Kiparsky, [2] Lachmann's law is an example of a sound law that affects deep phonological structure, not the surface result of phonological rules. In Proto-Indo-European, a voiced stop was already pronounced as voiceless before voiceless stops, as the assimilation by voicedness must have been operational in PIE (*h₂eǵtos → *h₂eḱtos 'forced, made').