Morphophonology (also morphophonemics or morphonology) is the branch of linguistics that studies the interaction between morphological and phonological or phonetic processes. Its chief focus is the sound changes that take place in morphemes (minimal meaningful units) when they combine to form words. Morphophonological analysis often involves an attempt to give a series of formal rules that successfully predict the regular sound changes occurring in the morphemes of a given language. Such a series of rules converts a theoretical underlying representation into a surface form that is actually heard. The units of which the underlying representations of morphemes are composed are sometimes called morphophonemes. The surface form produced by the morphophonological rules may consist of phonemes (which are then subject to ordinary phonological rules to produce speech sounds or phones), or else the morphophonological analysis may bypass the phoneme stage and produce the phones itself.
1 Morphophonemes and morphophonological rules 2 Types of changes 3 Relation with phonology 4 Isolation forms 5 Orthography 6 References 7 Bibliography
Morphophonemes and morphophonological rules When morphemes combine, they influence each other's sound structure (whether analyzed at a phonetic or phonemic level), resulting in different variant pronunciations for the same morpheme. Morphophonology attempts to analyze these processes. A language's morphophonological structure is generally described with a series of rules which, ideally, can predict every morphophonological alternation that takes place in the language. An example of a morphophonological alternation in English is provided by the plural morpheme, written as "-s" or "-es". Its pronunciation alternates between [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/. On a morphophonological level, however, they may all be considered to be forms of the underlying object //z//, which is a morphophoneme. The different forms it takes are dependent on the segment at the end of the morpheme to which it attaches: the dependencies are described by morphophonological rules. (The behaviour of the English past tense ending "-ed" is similar: it can be pronounced /t/, /d/ or /ɪd/, as in hoped, bobbed and added.) The plural suffix "-s" can also influence the form taken by the preceding morpheme, as in the case of the words leaf and knife, which end with [f] in the singular/but have [v] in the plural (leaves, knives). On a morphophonological level, the morphemes may be analyzed as ending in a morphophoneme //F//, which becomes voiced when a voiced consonant (in this case the //z// of the plural ending) is attached to it. The rule may be written symbolically as /F/ -> [αvoice] / __ [αvoice]. This expression is called Alpha Notation in which α can be +(positive value) or -(negative value). Common conventions to indicate a morphophonemic rather than phonemic representation are double slashes (// //) (as above, implying that the transcription is 'more phonemic than simply phonemic'), pipes ( ), double pipes (‖ ‖) and curly brackets ( ). For instance, the English word cats may be transcribed phonetically as [ˈkʰæts], phonemically as /ˈkæts/ and morphophonemically as //ˈkætz//, if the plural is argued to be underlyingly //z//, assimilating to /s/ after a voiceless nonsibilant. The tilde ~ may indicate morphological alternation, as in //ˈniː~ɛl+t// for kneel~knelt (the plus sign '+' indicates a morpheme boundary). Types of changes Inflected and agglutinating languages may have extremely complicated systems of morphophonemics. Examples of complex morphophonological systems include:
Sandhi, the phenomenon behind the English examples of plural and past
tense above, is found in virtually all languages to some degree. Even
Mandarin, which is sometimes said to display no morphology,
nonetheless displays tone sandhi, a morphophonemic alternation.
Consonant gradation, found in some
Relation with phonology
Until the 1950s, many phonologists assumed that neutralizing rules
generally applied before allophonic rules. Thus phonological analysis
was split into two parts: a morphophonological part, where
neutralizing rules were developed to derive phonemes from
morphophonemes; and a purely phonological part, where phones were
derived from the phonemes. Since the 1960s (in particular with the
work of the generative school, such as Chomsky and Halle's The Sound
Pattern of English) many linguists have moved away from making such a
split, instead regarding the surface phones as being derived from the
underlying morphophonemes (which may be referred to using various
terminology) through a single system of (morpho)phonological rules.
The purpose of both phonemic and morphophonemic analysis is to produce
simpler underlying descriptions of what appear on the surface to be
complicated patterns. In the purely phonemic analysis the data is just
a set of words in a language, while for the purposes of morphophonemic
analysis the words must be considered in grammatical paradigms to take
account of the underlying morphemes. It is postulated that morphemes
are recorded in the speaker's "lexicon" in an invariant
(morphophonemic) form, which, in a given environment, is converted by
rules into a surface form. The analyst attempts to present as
completely as possible a system of underlying units (morphophonemes)
and a series of rules that act on them, so as to produce surface forms
consistent with the linguistic data.
The isolation form of a morpheme is the form in which that morpheme
appears in isolation (when not subject to the effects of any other
morpheme). In the case of a bound morpheme, such as the English past
tense ending "-ed", it will generally not be possible to identify an
isolation form, since such a morpheme does not occur in isolation.
It is often reasonable to assume that the isolation form of a morpheme
provides its underlying representation. For example, in some varieties
of American English, plant is pronounced [plænt], while planting is
[ˈplænɪŋ], where the morpheme "plant-" appears in the form
[plæn]. Here the underlying form can be assumed to be //plænt//,
corresponding to the isolation form, since rules can be set up to
derive the reduced form [plæn] from this (while it would be difficult
or impossible to set up rules that would derive the isolation form
[plænt] from an underlying //plæn//).
That is not always the case, however; sometimes the isolation form
itself is subject to neutralization that does not apply to some other
instances of the morpheme. For example, the French word petit
("small") is pronounced in isolation without the final [t] sound, but
in certain derived forms (such as the feminine petite), the [t] is
heard. If the isolation form were adopted as the underlying form, the
information that there is a final "t" would be lost, and it would be
hard then to explain the appearance of the "t" in the inflected forms.
Assume that the grammar of a language has two rules, rule A and rule
B, with A ordered before B. If, in a given derivation, the application
of rule A creates the environment for rule B to apply, which was not
present before the application of rule A, rule A and B are in a
feeding relationship so rule A feeds rule B.
Assuming again rule A and B, with A ordered before B in the derivation
in which rule A destroys the environment to which rule B shall apply,
one says A and B are in a bleeding order.
If it is assumed again that a pair of rules A and B, with A ordered
before B and B creating an environment to which A could have applied,
B is said to counterfeed A, and the relationship is counterfeeding.
If one assumes a pair of rules A and B and A ordered before B is in a
counterbleeding relationship if B destroys the environment that A
applies to and has already applied, therefore, B ordered after A has
missed its chance to bleed A.
Conjunctive ordering is the ordering that ensures that all rules are
applied in a derivation before the surface representation is arrived
at. One says that rules applied in a feeding relationship are
Disjunctive ordering is a rule that applies and prevents the other
rule to apply up to the surface representation. Such rules have a
bleeding relationship and are disjunctively ordered.
The principle behind alphabetic writing systems is that the letters
(graphemes) represent phonemes. However, in many orthographies based
on such systems the correspondences between graphemes and phonemes are
not exact, and it is sometimes the case that certain spellings better
represent a word's morphophonological structure rather than the purely
phonological. An example of this is that the English plural morpheme
is written -s regardless of whether it is pronounced as /s/ or /z/; we
write cats and dogs, not dogz.
The above example involves active morphology (inflection), and
morphophonemic spellings are common in this context in many languages.
Another type of spelling that can be described as morphophonemic is
the kind that reflects the etymology of words. Such spellings are
particularly common in English; examples include science /saɪ/ vs.
unconscious /ʃ/, prejudice /prɛ/ vs. prequel /priː/, sign /saɪn/
signature /sɪɡn/, nation /neɪ/ vs. nationalism /næ/, and special
/spɛ/ vs. species /spiː/.
For more detail on this topic, see
^ Note, however, that in the IPA single and double pipes are used to indicate minor and major suprasegmental groups respectively as well as dental and alveolar lateral clicks. ^ Gibbon, Dafydd; Moore, Roger; Winski, Richard (1998). Handbook of Standards and Resources for Spoken Language Systems: Spoken language characterisation. Berlin; New York: Walter de Gruyter. pp. 61–62. ISBN 9783110157345. ^ Collinge (2002) An Encyclopedia of Language, §4.2.
Hayes, Bruce (2009). "Morphophonemic Analysis" Introductory Phonology, pp. 16