Great Vowel Shift
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The Great Vowel Shift was a major series of changes in the pronunciation of the English language that took place in southern England, primarily between 1350 and the 1600s and 1700s, today influencing effectively all dialects of English. Through this vowel shift, all Middle English long vowels changed their pronunciation. English spelling was first becoming standardized in the 15th and 16th centuries, and the Great Vowel Shift is responsible for the fact that English spellings now often strongly deviate in their representation of English pronunciations.
History of analysisEdit
The main difference between the pronunciation of Middle English in the year 1400 and Modern English (Received Pronunciation) is in the value of the long vowels. Long vowels in Middle English had "continental" values, much like those in Italian and Standard German, but in standard Modern English, they have entirely different pronunciations. The change in pronunciation is known as the Great Vowel Shift.
|Late Middle English
before the GVS
after the GVS
This timeline shows the main vowel changes that occurred between late Middle English in the year 1400 and Received Pronunciation in the mid-20th century by using representative words. The Great Vowel Shift occurred in the lower half of the table, between 1400 and 1600. The changes that happened after 1600 are not usually considered part of the Great Vowel Shift proper. Pronunciation is given in the International Phonetic Alphabet:
Middle English vowel systemEdit
Before the Great Vowel Shift, Middle English in Southern England had seven long vowels, /iː eː ɛː aː ɔː oː uː/. The vowels occurred in the words bite, meet, meat, mate, boat, boot and out.
|close||/iː/: bite||/uː/: out|
|close-mid||/eː/: meet||/oː/: boot|
|open-mid||/ɛː/: meat||/ɔː/: boat|
The words had very different pronunciations in Middle English from their pronunciations in Modern English. Long i in bite was pronounced as /iː/ so Middle English bite sounded like Modern English beet /biːt/; long e in meet was pronounced as /eː/ so Middle English meet sounded similar to Modern English mate /meɪt/; long a in mate was pronounced as /aː/, with a vowel like Scottish English ah in father [faːðər] or General American short o in cot /kät/; and long o in boot was pronounced as /oː/, similar to modern oa in General American boat /oʊ/. In addition, Middle English had a long /ɛː/ in beat, like modern short e in bed but pronounced longer, and a long /ɔː/ in boat.
After around 1300, the long vowels of Middle English began changing in pronunciation. The two close vowels, /iː uː/, became diphthongs (vowel breaking), and the other five, /eː ɛː aː ɔː oː/, underwent an increase in tongue height (raising).
The changes are known as the Great Vowel Shift. They occurred over several centuries and can be divided into two phases. The first phase affected the close vowels /iː uː/ and the close-mid vowels /eː oː/: /eː oː/ were raised to /iː uː/, and /iː uː/ became the diphthongs /ei ou/ or /əi əu/. The second phase affected the open vowel /aː/ and the open-mid vowels /ɛː ɔː/: /aː ɛː ɔː/ were raised, in most cases changing to /eː iː oː/.
The Great Vowel Shift changed vowels without merger so Middle English before the vowel shift had the same number of vowel phonemes as Early Modern English after the vowel shift. After the Great Vowel Shift, some vowel phonemes began merging. Immediately after the Great Vowel Shift, the vowels of meet and meat were different, but they are merged in Modern English, and both words are pronounced as /miːt/. However, during the 16th and the 17th centuries, there were many different mergers, and some mergers can be seen in individual Modern English words like great, which is pronounced with the vowel /eɪ/ as in mate rather than the vowel /iː/ as in meat.
This is a simplified picture of the changes that happened between late Middle English and today's English. Pronunciations in 1400, 1500, 1600, and 1900 are shown. To hear recordings of the sounds, click the phonetic symbols.
The first phase of the Great Vowel Shift affected the Middle English close-mid vowels /eː oː/, as in beet and boot, and the close vowels /iː uː/, as in bite and out. The close-mid vowels /eː oː/ became close /iː uː/, and the close vowels /iː uː/ became diphthongs. The first phase was complete in 1500, meaning that by that time, words like beet and boot had lost their Middle English pronunciation, and were pronounced with the same vowels as in Modern English. The words bite and out were pronounced with diphthongs, but not the same diphthongs as in Modern English.
Scholars agree that the Middle English close vowels /iː uː/ became diphthongs around the year 1500, but disagree about what diphthongs they changed to. According to Lass, the words bite and out after diphthongization were pronounced as /beit/ and /out/, similar to American English bait /beɪt/ and oat /oʊt/. Later, the diphthongs /ei ou/ shifted to /ɛi ɔu/, then /əi əu/, and finally to Modern English /aɪ aʊ/. This sequence of events is supported by the testimony of orthoepists before Hodges in 1644.
However, many scholars such as Dobson (1968), Kökeritz (1953), and Cercignani (1981) argue for theoretical reasons that, contrary to what 16th-century witnesses report, the vowels /iː uː/ were actually immediately centralized and lowered to /əi əu/.[nb 1]
Evidence from northern English and Scots (see below) suggests that the close-mid vowels /eː oː/ were the first to shift. As the Middle English vowels /eː oː/ were raised towards /iː uː/, they forced the original Middle English /iː uː/ out of place and caused them to become diphthongs /ei ou/. This type of sound change, in which one vowel's pronunciation shifts so that it is pronounced like a second vowel, and the second vowel is forced to change its pronunciation, is called a push chain.
However, according to professor Jürgen Handke, for some time, there was a phonetic split between words with the vowel /iː/ and the diphthong /əi/, in words where the Middle English /iː/ shifted to the Modern English /aɪ/. For an example, high was pronounced with the vowel /iː/, and like and my were pronounced with the diphthong /əi/. Therefore, for logical reasons, the close vowels /iː uː/ could have diphthongized before the close-mid vowels /eː oː/ raised. Otherwise, high would probably rhyme with thee rather than my. This type of chain is called a drag chain.
The second phase of the Great Vowel Shift affected the Middle English open vowel /aː/, as in mate, and the Middle English open-mid vowels /ɛː ɔː/, as in meat and boat. Around 1550, Middle English /aː/ was raised to /æː/. Then, after 1600, the new /æː/ was raised to /ɛː/, with the Middle English open-mid vowels /ɛː ɔː/ raised to close-mid /eː oː/. 
During the first and the second phases of the Great Vowel Shift, long vowels were shifted without merging with other vowels, but after the second phase, several vowels merged. The later changes also involved the Middle English diphthong /ai/, as in day, which had monophthongised to /ɛː/, and merged with Middle English /aː/ as in mate or /ɛː/ as in meat.
During the 16th and 17th centuries, several different pronunciation variants existed among different parts of the population for words like meet, meat, mate, and day. In each pronunciation variant, different pairs or trios of words were merged in pronunciation. Four different pronunciation variants are shown in the table below. The fourth pronunciation variant gave rise to Modern English pronunciation. In Modern English, meet and meat are merged in pronunciation and both have the vowel /iː/, and mate and day are merged with the diphthong /eɪ/, which developed from the 16th-century long vowel /eː/.
|Word||16th century pronunciation variants|
Modern English typically has the meet–meat merger: both meet and meat are pronounced with the vowel /iː/. Words like great and steak, however, have merged with mate and are pronounced with the vowel /eɪ/, which developed from the /eː/ shown in the table above.
Northern English and ScotsEdit
The Great Vowel Shift affected other dialects as well as the standard English of southern England but in different ways. In Northern England, the long back vowels remained unaffected because the long mid back vowel had undergone an earlier shift. Similarly, the Scots language in Scotland had a different vowel system before the Great Vowel Shift, as /oː/ had shifted to /øː/ in Early Scots. In the Scots equivalent of the Great Vowel Shift, the long vowels /iː/, /eː/ and /aː/ shifted to /ei/, /iː/ and /eː/ by the Middle Scots period and /uː/ remained unaffected.
The first step in the Great Vowel Shift in Northern and Southern English is shown in the table below. The Northern English developments of Middle English /iː, eː/ and /oː, uː/ were different from Southern English. In particular, the Northern English vowels /iː/ in bite, /eː/ in feet, and /oː/ in boot shifted, while the vowel /uː/ in house did not:
The vowel systems of Northern and Southern Middle English immediately before the Great Vowel Shift were different in one way. In Northern Middle English, the back close-mid vowel /oː/ in boot had already shifted to front /øː/ (a sound change known as fronting), like the long ö in German hören [ˈhøːʁən] ( listen) "hear". Thus, Southern English had a back close-mid vowel /oː/, but Northern English did not:
In both Northern and Southern English, the first step of the Great Vowel Shift raised the close-mid vowels to become close. Northern Middle English had two close-mid vowels – /eː/ in feet and /øː/ in boot – which were raised to /iː/ and /yː/. Later on, Northern English /yː/ changed to /iː/, so that boot has the same vowel as feet. Southern Middle English had two close-mid vowels – /eː/ in feet and /oː/ in boot – which were raised to /iː/ and /uː/.
In Southern English, the close vowels /iː/ in bite and /uː/ in house shifted to become diphthongs, but in Northern English, /iː/ in bite shifted but /uː/ in house did not.
If the difference between the Northern and Southern vowel shifts is caused by the vowel systems at the time of the Great Vowel Shift, /uː/ did not shift because there was no back mid vowel /oː/ in Northern English. In Southern English, shifting of /oː/ to /uː/ could have caused[why?] diphthongisation of original /uː/, but because Northern English had no back close-mid vowel /oː/ to shift, the back close vowel /uː/ did not diphthongise.
Not all words underwent certain phases of the Great Vowel Shift. Examples are father, which failed to become /ɛː/, and broad, which failed to become /oʊ/. The word room, which was spelled as roum in Middle English, retains its Middle English pronunciation. It is an exception to the shifting of /uː/ to /aʊ/ because it is followed by m, a labial consonant.
The class ea did not take the step to /iː/ in several words. The presence of /r/ in swear and bear caused the vowel quality to be retained but not in the cases of hear and near. Shortening of long vowels at various stages produced further complications: ea is again a good example by shortening commonly before coronal consonants such as d and th, thus: dead, head, threat, wealth etc. (That is known as the bred–bread merger.) The oo was shortened from /uː/ to /ʊ/, in many cases before k, d and less commonly t: book, foot, good, etc. Some words subsequently changed from /ʊ/ to /ʌ/: blood, flood. Similar but older shortening occurred for some instances of ou: could.
Some loanwords, such as soufflé and umlaut, have retained a spelling from their origin language that may seem similar to the previous examples; but, since they were not a part of English at the time of the Great Vowel Shift, they are not actually exceptions to the shift.
The printing press was introduced to England in the 1470s by William Caxton and later Richard Pynson. The adoption and use of the printing press accelerated the process of standardization of English spelling, which continued into the 16th century. The standard spellings were those of Middle English pronunciation, and spelling conventions continued from Old English. However, the Middle English spellings were retained into Modern English while the Great Vowel Shift was taking place, which caused some of the peculiarities of Modern English spelling in relation to vowels.
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