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"Sound change and "alternation
"Fortition
"Dissimilation

In "linguistics, the Indo-European ablaut (pronounced "/ˈæblt/) is a system of "apophony (regular "vowel variations) in the "Proto-Indo-European language. All modern "Indo-European languages have inherited the feature, though its prevalence and productivity strongly varies.

An example of ablaut in English is the "strong verb sing, sang, sung and its related noun song, a paradigm inherited directly from the Proto-Indo-European stage of the language.

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History of the concept[edit]

The term ablaut (from German ab- in the sense "down, reducing, gradated" + Laut "sound", thus literally meaning "sound gradation") was coined in the early nineteenth century by linguist "Jacob Grimm. However, the phenomenon of the Indo-European ablaut itself was first recorded more than 2000 years earlier by the "Sanskrit grammarians and was codified by "Pāṇini in his "Ashtadhyayi, where the terms "guṇa and "vṛddhi were used to describe the phenomena now known respectively as the full grade and lengthened grade.

In the context of European languages, the phenomenon was first described in the early 18th century by the Dutch linguist "Lambert ten Kate, in his book Gemeenschap tussen de Gottische spraeke en de Nederduytsche ("Commonality between the "Gothic language and "Low German [Dutch]", 1710).

Overview of Proto-Indo-European[edit]

Since ablaut was a regular system in Proto-Indo-European (PIE) but survives only as irregular or partially regular variations in the recorded languages, any explanation of ablaut has to begin with an overview of PIE.

Proto-Indo-European (PIE) is the hypothetical parent language from which most of the modern and ancient European languages evolved. By comparing the recorded forms from PIE's "daughter languages, linguists can infer the forms of the parent language. However, it is not possible to be certain how the reconstructed forms were pronounced, and the reconstructions are to be understood as an encoding of the deduced phonemes, rather than a reliable indication of the actual pronunciations.

Established convention marks all PIE forms with an asterisk to indicate that they are hypothetical. For more details on these reconstructions, see "Proto-Indo-European language, "Laryngeal theory and "Comparative method.

Ablaut and vowel gradation[edit]

Vowel gradation is any vowel difference between two related words (such as photograph [ˈfəʊtəgrɑːf] and photography [fəˈtɒgrəfi]) or two forms of the same word (such as man and men). The difference need not be indicated in the spelling. There are many kinds of vowel gradation in English and other languages, which are discussed generally in the article "apophony. Some involve a variation in vowel length, others in vowel coloring (qualitative gradation: man/men) and others the complete disappearance of a vowel (reduction to zero: could notcouldn't).

For the study of European languages, one of the most important instances of vowel gradation is the Indo-European ablaut, remnants of which can be seen in the English verbs ride, rode, ridden, or fly, flew, flown. For simply learning English grammar, it is enough to note that these verbs are "irregular, but understanding why they have unusual forms that seem irregular (and indeed why they are actually perfectly regular within their own terms) requires digging back into the grammar of the "reconstructed proto-language, where they were regular.

Ablaut is the oldest and most extensive single source of vowel gradation in the Indo-European languages and must be distinguished clearly from other forms of gradation, which developed later, such as Germanic "umlaut (man/men, goose/geese, long/length) or the results of modern English word-stress patterns (man/woman, photograph/photography). Confusingly, in some contexts, the terms 'ablaut', 'vowel gradation', 'apophony' and 'vowel alternation' are used synonymously, especially in synchronic comparisons, but "historical linguists prefer to keep 'ablaut' for the specific Indo-European phenomenon, which is the meaning intended by the linguists who first coined the word.

Ablaut grades[edit]

In Proto-Indo-European, the basic, inherent vowel of most syllables was a short e. Ablaut is the name of the process whereby this short e changed, becoming short o, long ē, long ō or sometimes disappearing entirely to leave no vowel at all.

Thus, ablaut turned short e into the following sounds:

zero short long
e ē
o ō

If a syllable had a short e, it is said to be in the "e-grade" or "full grade". When it had no vowel, it is said to be in the "zero grade". Syllables with long vowels are said to be in "lengthened grade". (When the e-grade or the o-grade is referred to, the short vowel forms are meant.)

A classic example of the five grades of ablaut in a single root is provided by the different case forms of two closely related Greek words. In the following table, an acute accent (´) marks the syllable carrying the word stress; a macron (¯) marks long vowels and the syllable in bold is the one illustrating the different vowel gradations.

Ablaut grade PIE (reconstruction) Greek (Greek transliterated) Translation
e-grade or full grade *ph2-tér-m̥ πα-τέρ pa-tér-a "father" (noun, accusative)
lengthened e-grade *ph2-tḗr πα-τήρ pa-tḗr "father" (noun, nominative)
zero-grade *ph2-tr-és πα-τρ-ός pa-tr-ós "father's" (noun, genitive)
o-grade *n̥-péh2-tor-m̥ ἀ-πά-τορ a-pá-tor-a "fatherless" (adjective, accusative)
lengthened o-grade *n̥-péh2-tōr ἀ-πά-τωρ a-pá-tōr "fatherless" (adjective, nominative)

In this unusually neat example, the following can be seen:

As with most reconstructions, however, scholars differ about the details of this example.

One way to think of this system is that Proto-Indo-European originally had only one vowel, short e, and over time, it changed according to phonetic context, so the language started to develop a more complex vowel system. Thus, it has often been speculated that an original e-grade underwent two changes in some phonetic environments: under certain circumstances, it changed to o (the o-grade) and in others, it disappeared entirely (the zero-grade).

However, that is not certain: the phonetic conditions that controlled ablaut have never been determined, and the position of the word stress may not have been a key factor at all.["citation needed] There are many counterexamples to the proposed rules: *deywós and its nominative plural *deywóes show pretonic and posttonic e-grade, respectively, and *wĺ̥kʷos has an accented zero grade.

Lengthened grades[edit]

Many examples of lengthened grades, including those listed above, are not directly conditioned by ablaut. Instead, they are a result of sound changes like "Szemerényi's law and "Stang's law, which caused "compensatory lengthening of originally-short vowels. In the examples above, Szemerényi's law affected the older sequences *ph2-tér-s and *n̥-péh2-tor-s, changing them to *ph2-tḗr and *n̥-péh2-tōr. Thus, these forms were originally in the regular, unlengthened e-grade and o-grade. Such lengthened vowels were, however, later "grammaticalised and spread to other words in which the change did not occur.

Nevertheless, there are examples of true lengthened grades, in which short e alternates with long ē. Examples are the verbs with ""Narten" inflection, and nouns like *mḗh₁-n̥s "moon", genitive *méh₁-n̥s-os. Alternations of this type were rare, however, and the e ~ o ~ alternation was the most common by far. The long ō grade was rarer still and may not have actually been a part of the ablaut system at all.

Zero grade[edit]

The zero grade of ablaut may appear difficult for speakers of English. However, there are several languages who show fricatives and even plosives in syllable nuclei. In the case of *ph2trés, which may already have been pronounced something like [pɐtrés], it is not difficult to imagine it as a contraction of an older *ph2terés, pronounced perhaps [pɐterés], as this combination of consonants and vowels would be possible in English as well. In other cases, however, the absence of a vowel strikes the speaker of a modern western European language as unpronounceable.

To understand, one must be aware that there were a number of sounds that were consonants in principle but could operate in ways analogous to vowels: the four syllabic sonorants, the three "laryngeals and the two semi-vowels:

When u and i came in postvocalic positions, the result was a diphthong. Ablaut is nevertheless regular and looks like this:

e-grade o-grade zero-grade
ey oy i
ew ow u

Thus, any of these could replace the ablaut vowel when it was reduced to the zero-grade: the pattern CVrC (for example, *bʰergʰ-) could become CrC (*bʰr̥gʰ-).

However, not every PIE syllable was capable of forming a zero grade; some consonant structures inhibited it in particular cases, or completely. Thus, for example, although the "preterite plural of a Germanic strong verb (see below) is derived from the zero grade, classes 4 and 5 have instead vowels representing the lengthened e-grade, as the stems of these verbs could not have sustained a zero grade in this position.["citation needed]

Zero grade is said to be from pre-PIE "syncope in unaccented syllables,["citation needed] but in some cases the lack of accent does not cause zero grade: *deywó-, nominative plural *-es "god". There does not seem to be a rule governing the unaccented syllables that take zero grade and the ones that take stronger grades.["citation needed]

Nowadays a few Indo-Europeanists reject the syncope hypothesis, and instead understand early PIE as a polysynthetic and templatic type language with discontinuous consonant roots and vowel transfixes.["citation needed]

a-grade[edit]

It is still a matter of debate whether PIE had an original a-vowel at all. In later PIE, the disappearance of the laryngeal h2 could leave an a-colouring and this may explain all occurrences of a in later PIE. However, some argue controversially that the e-grade could sometimes be replaced by an a-grade without the influence of a laryngeal, which might help to explain the vowels in class 6 "Germanic verbs, for example.

Subsequent development[edit]

Although PIE had only this one, basically regular, ablaut sequence, the development in the daughter languages is frequently far more complicated, and few reflect the original system as neatly as Greek. Various factors, such as "vowel harmony, assimilation with nasals, or the effect of the presence of laryngeals in the Indo-European (IE) roots as well as their subsequent loss in most daughter languages, mean that a language may have several different vowels representing a single vowel in the parent language.

In particular, the zero grade was often subject to modification from changes in the pronunciation of syllabic sonorants. For example, in Germanic, syllabic sonorants acquired an "epenthetic -u-, thus converting the original zero grade to a new "u-grade" in many words. Thus, while ablaut survives in some form in all Indo-European languages, it became progressively less systematic over time.

Ablaut explains vowel differences between related words of the same language. For example:

Ablaut also explains vowel differences between cognates in different languages.

The explanation is that the Germanic and Greek nominative forms developed from the o-grade, the Latin word and the Germanic genitive from the zero-grade (in which syllabic developed into en much in the same way as it became un in Germanic). Going a step further back, some scholars reconstruct *h1dónts, from the zero grade of the root *h1ed- 'to eat' and the participal -ont- and explain it as 'the eating one'.

For the English-speaking non-specialist, a good reference work for quick information on IE roots, including the difference of ablaut grade behind related lexemes, is "Calvert Watkins, The American Heritage Dictionary of Indo-European Roots, 2nd edition, Boston & New York 2000.

(Note that in discussions of lexis, Indo-European roots are normally cited in the e-grade, without any inflections.)

Grammatical function[edit]

In PIE, there were already ablaut differences within the paradigms of verbs and nouns. These were not the main markers of grammatical form, since the inflection system served this purpose, but they must have been significant secondary markers.

An example of ablaut in the paradigm of the noun in PIE can be found in *pértus, from which the English words ford and (via Latin) port are derived (both via the zero-grade stem *pr̥t-).

root (p-r) suffix (t-u)
Nominative *pér-tu-s e-grade zero-grade
Accusative *pér-tu-m e-grade zero-grade
Genitive *pr̥-téw-s zero-grade e-grade
Dative *pr̥-téw-ey zero-grade e-grade

An example in a verb is *bʰeydʰ- "to wait" (cf. "bide").

e-grade
Perfect (third-person singular) *bʰe-bʰóydʰ-e o-grade (note "reduplicating prefix)
Perfect (third plural) *bʰe-bʰidʰ-ḗr zero-grade (note reduplicating prefix)

In the daughter languages, these came to be important markers of grammatical distinctions. The vowel change in the Germanic strong verb, for example, is the direct descendant of that seen in the Indo-European verb paradigm. Examples in modern English are the following:

"Infinitive "Preterite "Past participle
sing sang sung
give gave given
strive strove striven
break broke broken

It was in this context of Germanic verbs that ablaut was first described, and this is still what most people primarily associate with the phenomenon. A fuller description of ablaut operating in English, German and Dutch verbs and of the historical factors governing these can be found at the article "Germanic strong verb.

The same phenomenon is displayed in the verb tables of "Latin, "Ancient Greek and "Sanskrit. Examples of ablaut as a grammatical marker in Latin are the vowel changes in the perfect stem of verbs.

"Present tense "Perfect
agō ēgī "to do"
videō vīdī "to see" (vowel lengthening)
sedeō sēdī "to sit" (vowel lengthening)
cadō cecidī "to fall" (note reduplicating prefix)

Ablaut can often explain apparently random irregularities. For example, the verb "to be" in Latin has the forms est (he is) and sunt (they are). The equivalent forms in German are very similar: ist and sind. The same forms are present in Slavic languages: est and sut.

The difference between singular and plural in these languages is easily explained: the PIE root is *h1es-. In the singular, the stem is stressed, so it remains in the e-grade, and it takes the inflection -ti. In the plural, however, the inflection -énti was stressed, causing the stem to reduce to the zero grade: *h1es-énti*h1s-énti. See main article: "Indo-European copula.

Some of the morphological functions of the various grades are as follows:

e-grade:

o-grade:

  1. stem-stressed masculine action nouns (Greek gónos "offspring", Sanskrit jánas "creature, person"; Greek trókhos "circular course" < "*act of running");
  2. ending-stressed feminine, originally collective, action nouns (Greek gonḗ "offspring", Sanskrit janā́ "birth");
  3. ending-stressed masculine agent nouns (Greek trokhós "wheel" < "*runner").

zero-grade:

lengthened grade:

Many examples of lengthened-grade roots in the daughter languages are actually caused by the effect of "laryngeals and of "Szemerényi's law and "Stang's law, which operated within Indo-European times.

See also[edit]

References[edit]

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