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In linguistics, vowel length is the perceived length of a vowel sound: the corresponding physical measurement is duration. In some languages vowel length is an important phonemic factor, meaning vowel length can change the meaning of the word, for example in Arabic, Czech, Dravidian languages (such as Tamil), some Finno-Ugric languages (such as Finnish and Estonian), Japanese, Kyrgyz, Samoan, and Xhosa. Some languages in the past likely had the distinction even though their descendants do not, with an example being Latin and its descendent Romance languages.

Whether vowel length alone changes word-meanings in English depends on the particular dialect; it is able to do so in a few non-rhotic dialects, such as Australian English, Lunenburg English, New Zealand English, South African English, and possibly some Southern British English, and in a few rhotic dialects, such as Scottish English and Northern Irish English. It also plays a lesser phonetic role in Cantonese, unlike in other varieties of Chinese, which do not have phonemic vowel length distinctions.

Many languages do not distinguish vowel length phonemically, meaning that vowel length does not change meaning. However, the amount of time a vowel is uttered can change based on factors such as the phonetic characteristics of the sounds around it, for instance whether the vowel is followed by a voiced or a voiceless consonant.

Languages that do distinguish vowel length phonemically usually only distinguish between short vowels and long vowels. Very few languages distinguish three phonemic vowel lengths; some that do so are Estonian, Luiseño, and Mixe. However, languages with two vowel lengths may permit words in which two adjacent vowels are of the same quality: Japanese ほうおう, hōō, "phoenix", or Ancient Greek ἀάατος , "inviolable". Some languages that do not ordinarily have phonemic vowel length but permit vowel hiatus may similarly exhibit sequences of identical vowel phonemes that yield phonetically long vowels, such as Georgian გააადვილებ, gaaadvileb [ɡa.a.ad.vil.eb], "you will facilitate it".

Related features

Stress is often reinforced by allophonic vowel length, especially when it is lexical. For example, French long vowels are always in stressed syllables. Finnish, a language with two phonemic lengths, indicates the stress by adding allophonic length, which gives four distinctive lengths and five physical lengths: short and long stressed vowels, short and long unstressed vowels, and a half-long vowel, which is a short vowel found in a syllable immediately preceded by a stressed short vowel: i-so.

Among the languages with distinctive vowel length, there are some in which it may occur only in stressed syllables, such as in Alemannic German, Scottish Gaelic and Egyptian Arabic. In languages such as Czech, Finnish, some Irish dialects and Classical Latin, vowel length is distinctive also in unstressed syllables.

In some languages, vowel length is sometimes better analyzed as a sequence of two identical vowels. In Finnic languages, such as Finnish, the simplest example follows from consonant gradation: haka → haan. In some cases, it is caused by a following chroneme, which is etymologically a consonant: jää "ice" ← Proto-Uralic *jäŋe. In non-initial syllables, it is ambiguous if long vowels are vowel clusters; poems written in the Kalevala meter often syllabicate between the vowels, and an (etymologically original) intervocalic -h- is seen in that and some modern dialects (taivaan vs. taivahan "of the sky"). Morphological treatment of diphthongs is essentially similar to long vowels. Some old Finnish long vowels have developed into diphthongs, but successive layers of borrowing have introduced the same long vowels again so the diphthong and the long vowel now again contrast (nuotti "musical note" vs. nootti "diplomatic note").

In Japanese, most long vowels are the results of the phonetic change of diphthongs; au and ou became ō, iu became yū, eu became yō, and now ei is becoming ē. The change also occurred after the loss of intervocalic phoneme /h/. For example, modern Kyōto (Kyoto) has undergone a shift: /kjauto/ → /kjoːto/. Another example is shōnen (boy): /seuneɴ/ → /sjoːneɴ/ .

Phonemic vowel length

As noted above, only a relatively few of the world's languages make a phonemic distinction between long and short vowels. Some families have many such languages, examples being the Dravidian languages and the Finno-Ugric languages. Other languages have fewer relatives with vowel length, including Arabic, Japanese, Scottish Gaelic. There are also older languages such as Sanskrit, Biblical Hebrew, and Latin which have phonemic vowel length but no descendants that preserve it.

In Latin and Hungarian, some long vowels are analyzed as separate phonemes from short vowels:

Vowel length contrasts with more than two phonemic levels are rare, and several hypothesized cases of three-level vowel length can be analysed without postulating this typologically unusual configuration. Estonian has three distinctive lengths, but the third is suprasegmental, as it has developed from the allophonic variation caused by now-deleted grammatical markers. For example, half-long 'aa' in saada comes from the agglutination *saa+tta+k */sɑːtˑɑk/ "send (saatta-) +(imperative)", and the overlong 'aa' in saada comes from *saa+dak "get+(infinitive)". As for languages that have three lengths, independent of vowel quality or syllable structure, these include Dinka, Mixe, Yavapai and Wichita. An example from Mixe is "guava", "spider", "knot". In Dinka the longest vowels are three moras long, and so are best analyzed as overlong e.g. /oːː/.

Four-way distinctions have been claimed, but these are actually long-short distinctions on adjacent syllables. For example, in Kikamba, there is , , , "hit", "dry", "bite", "we have chosen for everyone and are still choosing".

By language

In English

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Contrastive vowel length

In many varieties of English, vowels contrast with each other both in length and in quality, and descriptions differ in the relative importance given to these two features. Some descriptions of Received Pronunciation and more widely some descriptions of English phonology group all non-diphthongal vowels into the categories "long" and "short", convenient terms for grouping the many vowels of English. Daniel Jones proposed that phonetically similar pairs of long and short vowels could be grouped into single phonemes, distinguished by the presence or absence of phonological length (chroneme). The usual long-short pairings for RP are /iː + ɪ/, /ɑː + æ/, /ɜ: + ə/, /ɔː + ɒ/, /u + ʊ/, but Jones omits /ɑː + æ/. This approach is not found in present-day descriptions of English. Vowels show allophonic variation in length and also in other features according to the context in which they occur. The terms tense (corresponding to long) and lax (corresponding to short) are alternative terms that do not directly refer to length.

In Australian English, there is contrastive vowel length in closed syllables between long and short /e/ and /ɐ/. The following are minimal pairs of length:

Allophonic vowel length

In most varieties of English, for instance Received Pronunciation and General American, there is allophonic variation in vowel length depending on the value of the consonant that follows it: vowels are shorter before voiceless consonants and are longer when they come before voiced consonants. Thus, the vowel in bad /bæd/ is longer than the vowel in bat /bæt/. Also compare neat /niːt/ with need /niːd/. The vowel sound in "beat" is generally pronounced for about 190 milliseconds, but the same vowel in "bead" lasts 350 milliseconds in normal speech, the voiced final consonant influencing vowel length.

Cockney English features short and long varieties of the closing diphthong . The short corresponds to RP /ɔː/ in morphologically closed syllables (see thought split), whereas the long corresponds to the non-prevocalic sequence /ɔːl/ (see l-vocalization). The following are minimal pairs of length:

The difference is lost in running speech, so that fault falls together with fort and fought as or . The contrast between the two diphthongs is phonetic rather than phonemic, as the /l/ can be restored in formal speech: etc., which suggests that the underlying form of is /ˈfoːlt/ (John Wells says that the vowel is equally correctly transcribed with ⟨ɔʊ⟩ or ⟨oʊ⟩, not to be confused with GOAT /ʌʊ/, ). Furthermore, a vocalized word-final /l/ is often restored before a word-initial vowel, so that fall out (cf. thaw out , with an intrusive /r/) is somewhat more likely to contain the lateral [l] than fall . The distinction between and exists only word-internally before consonants other than intervocalic /l/. In the morpheme-final position only occurs (with the THOUGHT vowel being realized as ), so that all is always distinct from or . Before the intervocalic /l/ is the banned diphthong, though here either of the THOUGHT vowels can occur, depending on morphology (compare falling with aweless ).

In Cockney, the main difference between /ɪ/ and /ɪə/, /e/ and /eə/ as well as /ɒ/ and /ɔə/ is length, not quality, so that his , merry and Polly differ from here's , Mary and poorly (see cure-force merger) mainly in length. In broad Cockney, the contrast between /æ/ and /æʊ/ is also mainly one of length; compare hat with out (cf. the near-RP form , with a wide closing diphthong).

"Long" and "short" vowel letters in spelling and the classroom teaching of reading

In the teaching of English, vowels are commonly said to have a "short" and a "long" version. The terms "short" and "long" are not accurate from a linguistic point of view—at least in the case of Modern English—as the vowels are not actually short and long versions of the same sound; the terminology is a historical holdover due to their arising from proper vowel length in Middle English. The phonetic values of these vowels are shown in the table below.

In some types of phonetic transcription (e.g. pronunciation respelling), "long" vowel letters may be marked with a macron; for example, ⟨ā⟩ may be used to represent the IPA sound /eɪ/. This is sometimes used in dictionaries, most notably in Merriam-Webster (see Pronunciation respelling for English for more).

Similarly, the short vowel letters are rarely represented in teaching reading of English in the classroom by the symbols ă, ĕ, ĭ, ŏ, o͝o, and ŭ. The long vowels are more often represented by a horizontal line above the vowel: ā, ē, ī, ō, o͞o, and ū.

Origin

Vowel length may often be traced to assimilation. In Australian English, the second element of a diphthong has assimilated to the preceding vowel, giving the pronunciation of bared as , creating a contrast with the short vowel in bed .

Another common source is the vocalization of a consonant such as the voiced velar fricative or voiced palatal fricative or even an approximant, as the English 'r'. A historically-important example is the laryngeal theory, which states that long vowels in the Indo-European languages were formed from short vowels, followed by any one of the several "laryngeal" sounds of Proto-Indo-European (conventionally written h₁, h₂ and h₃). When a laryngeal sound followed a vowel, it was later lost in most Indo-European languages, and the preceding vowel became long. However, Proto-Indo-European had long vowels of other origins as well, usually as the result of older sound changes, such as Szemerényi's law and Stang's law.

Vowel length may also have arisen as an allophonic quality of a single vowel phoneme, which may have then become split in two phonemes. For example, the Australian English phoneme /æː/ was created by the incomplete application of a rule extending /æ/ before certain voiced consonants, a phenomenon known as the bad–lad split. An alternative pathway to the phonemicization of allophonic vowel length is the shift of a vowel of a formerly-different quality to become the short counterpart of a vowel pair. That too is exemplified by Australian English, whose contrast between /a/ (as in duck) and /aː/ (as in dark) was brought about by a lowering of the earlier /ʌ/.

Estonian, a Finnic language, has a rare phenomenon in which allophonic length variation has become phonemic after the deletion of the suffixes causing the allophony. Estonian had already inherited two vowel lengths from Proto-Finnic, but a third one was then introduced. For example, the Finnic imperative marker *-k caused the preceding vowels to be articulated shorter. After the deletion of the marker, the allophonic length became phonemic, as shown in the example above.

Notations

Latin alphabet

IPA

In the International Phonetic Alphabet the sign ː (not a colon, but two triangles facing each other in an hourglass shape; Unicode U+02D0) is used for both vowel and consonant length. This may be doubled for an extra-long sound, or the top half (ˑ) may be used to indicate that a sound is "half long". A breve is used to mark an extra-short vowel or consonant.

Estonian has a three-way phonemic contrast:

saada "to get" (overlong)

saada "send!" (long)

sada "hundred" (short)

Although not phonemic, a half-long distinction can also be illustrated in certain accents of English:

bead

beat

bid

bit

Diacritics

• Macron (ā), used to indicate a long vowel in Māori, Hawaiian, Samoan, Latvian and many transcription schemes, including romanizations for Sanskrit and Arabic, the Hepburn romanization for Japanese, and Yale for Korean. While not part of their standard orthography, the macron is used as a teaching aid in modern Latin and Ancient Greek textbooks. Macron is also used in modern official Cyrillic orthographies of some minority languages (Mansi, Kildin Sami, Evenki).
• Breves (ă) are used to mark short vowels in several linguistic transcription systems, as well as in Vietnamese and Alvarez-Hale's orthography for O'odham.
• Acute accent (á), used to indicate a long vowel in Czech, Slovak, Old Norse, Hungarian, Irish, traditional Scottish Gaelic (for long ó, é, as opposed to è, ò) and pre-20th-century transcriptions of Sanskrit, Arabic, etc.
  • An apex, which was a light acute accent that was angled lower and aligned with a letter's right, was used in Classical Latin. (However, for I, a taller ꟾ was sometimes used instead.)
• Circumflex (â), used for example in Welsh. The circumflex is occasionally used as a surrogate for the macrons, particularly in Hawaiian and in the Kunrei-shiki romanization of Japanese, or in transcriptions of Old High German. In transcriptions of Middle High German, a system where inherited lengths are marked with the circumflex and new lengths with the macron is occasionally used.
• Grave accent (à) is used in Scottish Gaelic, with a e i o u. (In traditional spelling, is è and is ò as in gnè, pòcaid, Mòr (personal name), while is é and is ó, as in dé, mór.)
• Ogonek (ą), used in Lithuanian to indicate long vowels.
• Trema (ä), used in Aymara to indicate long vowels.

Additional letters

• Vowel doubling, used consistently in Estonian, Finnish, Lombard, Navajo and Somali, and in closed syllables in Dutch, Afrikaans, and West Frisian. Example: Finnish tuuli /ˈtuːli/ 'wind' vs. tuli /ˈtuli/ 'fire'.
  • Estonian also has a rare "overlong" vowel length but does not distinguish it from the normal long vowel in writing, as they are distinguishable by context; see the example below.
• Consonant doubling after short vowels is very common in Swedish and other Germanic languages, including English. The system is somewhat inconsistent, especially in loanwords, around consonant clusters and with word-final nasal consonants. Examples:

Consistent use: byta /²byːta/ 'to change' vs bytta /²bʏtːa/ 'tub' and koma /²koːma/ 'coma' vs komma /²kɔma/ 'to come'

Inconsistent use: fält /ˈfɛlt/ 'a field' and kam /ˈkamː/ 'a comb' (but the verb 'to comb' is kamma)

• Classical Milanese orthography uses consonant doubling in closed short syllables, e.g., lenguagg 'language' and pubblegh 'public'.
• ie is used to mark the long /iː/ sound in German because of the preservation and the generalization of a historic ie spelling, which originally represented the sound /iə̯/. In Low German, a following e letter lengthens other vowels as well, e.g., in the name Kues /kuːs/.
• A following h is frequently used in German and older Swedish spelling, e.g., German Zahn 'tooth'.
• In Czech, the additional letter ů is used for the long U sound, and the character is known as a kroužek, e.g., kůň "horse". (It actually developed from the ligature "uo", which noted the diphthong /uo/ until it shifted to /uː/.)

Other signs

• Colon, ⟨꞉⟩, from Americanist phonetic notation, and used in orthographies based on it such as Oʼodham, Mohawk or Seneca. The triangular colon ⟨ː⟩ in the International Phonetic Alphabet derives from this.
• Middot or half-colon, ⟨ꞏ⟩, a more common variant in the Americanist tradition, also used in language orthographies.
• Saltillo (straight apostrophe), used in Miꞌkmaq, as evidenced by the name itself. This is the convention of the Listuguj orthography (Miꞌgmaq), and a common substitution for the acute accent (Míkmaq) of the Francis-Smith orthography.

No distinction

Some languages make no distinction in writing. This is particularly the case with ancient languages such as Old English. Modern edited texts often use macrons with long vowels, however. Australian English does not distinguish the vowels /æ/ from /æː/ in spelling, with words like 'span' or 'can' having different pronunciations depending on meaning. Other modern languages that do not represent vowel length in their standard orthography include Serbo-Croatian, Slovene and Hausa.

Other writing systems

In non-Latin writing systems, a variety of mechanisms have also evolved.

• In abjads derived from the Aramaic alphabet, notably Arabic and Hebrew, long vowels are written with consonant letters (mostly approximant consonant letters) in a process called mater lectionis e.g. in Modern Arabic the long vowel /aː/ is represented by the letter ا (Alif), the vowels /uː/ and /oː/ are represented by و (wāw), and the vowels /iː/ and /eː/ are represented by ي (yāʼ), while short vowels are typically omitted entirely. Most of these scripts also have optional diacritics that can be used to mark short vowels when needed.
• In South-Asian abugidas, such as Devanagari or the Thai alphabet, there are different vowel signs for short and long vowels.
• Ancient Greek also had distinct vowel signs, but only for some long vowels; the vowel letters η (eta) and ω (omega) originally represented long forms of the vowels represented by the letters ε (epsilon, literally "bare e") and ο (omicron – literally "small o", by contrast with omega or "large o"). The other vowel letters of Ancient Greek, α (alpha), ι (iota) and υ (upsilon), could represent either short or long vowel phones.
• Japanese phonology:
  • In the hiragana syllabary, long vowels are usually indicated by adding a vowel character after. For vowels /aː/, /iː/, and /uː/, the corresponding independent vowel is added. Thus: あ (a), おかあさん, "okaasan", mother; い (i), にいがた "Niigata", city in northern Japan (usually 新潟, in kanji); う (u), りゅう "ryuu" (usu. 竜), dragon. The mid-vowels /eː/ and /oː/ may be written with え (e) (rare) (ねえさん (姉さん), neesan, "elder sister") and お (o) , or with い (i) (めいれい (命令), "meirei", command/order) and う (u) (おうさま (王様), ousama, "king") depending on etymological, morphological, and historic grounds.
  • Most long vowels in the katakana syllabary are written with a special bar symbol ー (vertical in vertical writing), called a chōon, as in メーカー mēkā "maker" instead of メカ meka "mecha". However, some long vowels are written with additional vowel characters, as with hiragana, with the distinction being orthographically significant.
  • Some analyses make a distinction between a long vowel and a succession of two identical vowels, citing pairs such as 砂糖屋 satōya 'sugar shop' vs. 里親, satooya, 'foster parent' . They are usually identical in normal speech, but when enunciated a distinction may be made with a pause or a glottal stop inserted between two identical vowels.
  • In transcription: tsuki /tuki/ 'moon' vs. tsūki /tuuki/ 'airflow'.
• In the Korean Hangul alphabet, vowel length is not distinguished in normal writing. Some dictionaries use a double dot, ⟨:⟩, for example 무: "Daikon radish".
• In the Classic Maya script, also based on syllabic characters, long vowels in monosyllabic roots were generally written with word-final syllabic signs ending in the vowel -i rather than an echo-vowel. Hence, chaach "basket", with a long vowel, was written as cha-chi (compare chan "sky", with a short vowel, written as cha-na). If the nucleus of the syllable was itself i, however, the word-final vowel for indicating length was -a: tziik- "to count; to honour, to sanctify" was written as tzi-ka (compare sitz' "appetite", written as si-tz'i).

See also

• Gemination
• Length (phonetics)
• Mora (linguistics)

References

1. Liddell, H. G., and R. Scott (1996). A Greek-English Lexicon (revised 9th ed. with supplement). Oxford: Oxford University Press. p.1
2. Odden, David (2011). The Representation of Vowel Length. In Marc van Oostendorp, Colin J. Ewen, Elizabeth Hume, & Keren Rice (eds.) The Blackwell Companion to Phonology. Wiley-Blackwell, 465–490.
3. Wells, John C (1982). Accents of English. Cambridge University Press. p. 119.
4. Jones, Daniel; Roach, Peter; Setter, Jane; Esling, John (2011). The Cambridge English Pronouncing Dictionary (18th ed.). Cambridge. p. vii. ISBN 978-0-521-15255-6.
5. Wells, J.C. (2008). Longman Pronunciation Dictionary (3rd ed.). Longman. p. xxiii.
6. Jones, Daniel (1967). An Outline of English Phonetics (9th ed.). Heffer. p. 63.
7. Giegerich, H. (1992). English phonology: an introduction. Cambridge. p. para 3.3.
8. Kluender, Keith; Diehl, Randy; Wright, Beverly (1988). Vowel-length Differences Before Voiced and Voiceless Consonants: An Auditory Explanation. Journal of Phonetics. p. 153.
9. ^ Wells, John C. (1982). Accents of English. Vol. 2: The British Isles (pp. i–xx, 279–466). Cambridge University Press. doi:10.1017/CBO9780511611759. ISBN 0-52128540-2 .
10. "Guide to Pronunciation" (PDF). Merriam-Webster. Retrieved 2018-10-18.
11. "Short Vowels and Long Vowels Lesson Plan".
12. "OB-UGRIC LANGUAGES: CONCEPTUAL STRUCTURES, LEXICON, CONSTRUCTIONS, CATEGORIES TRANSLITERATION TABLES FOR NORTHERN MANSI : Counterparts of Cyrillic, FUT Counterparts of Cyrillic, FUT Cyrillic, FUT and IPA characters and IPA characters and IPA characters for Northern Mansi" (PDF). Babel.gwi.uni-muenchen.de. Retrieved 30 May 2018.
13. Carlo Porta on the Italian Wikisource
14. Labrune (2012), pp. 45–46.

• Labrune, Laurence (2012), The Phonology of Japanese, Oxford, England: Oxford University Press, ISBN 978-0-19-954583-4

External links

• Some Features of the Vernacular Finnish of Jyväskylä

• Phonetics
• Vowels