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In linguistic terms, non-rhotic accents are said to exclude the sound [r] from the syllable coda before a consonant or prosodic break. This is commonly (if misleadingly) referred to as "post-vocalic R".
Development of non-rhotic accents
The earliest traces of a loss of /r/ in English are found in the environment before /s/ in spellings from the mid-15th century: the Oxford English Dictionary reports bace for earlier barse (today "bass", the fish) in 1440 and passel for parcel in 1468. In the 1630s, the word juggernaut is first attested, which represents the Sanskrit word jagannāth, meaning "lord of the universe". The English spelling uses the digraph er to represent a Hindi sound close to the English schwa. Loss of coda /r/ apparently became widespread in southern England during the 18th century; John Walker uses the spelling ar to indicate the broad A of aunt in his 1775 dictionary and reports that card is pronounced "caad" in 1791 (Labov, Ash, and Boberg 2006: 47).
Non-rhotic speakers pronounce an /r/ in red, and most pronounce it in torrid and watery, where R is followed by a vowel, but not in hard, nor in car or water when those words are said in isolation. However, in most non-rhotic accents, if a word ending in written "r" is followed closely by a word beginning with a vowel, the /r/ is pronounced—as in water ice. This phenomenon is referred to as "linking R". Many non-rhotic speakers also insert epenthetic /r/s between vowels when the first vowel is one that can occur before syllable-final r (drawring for drawing). This so-called "intrusive R" has been stigmatized, but even speakers of so-called Received Pronunciation frequently "intrude" an epenthetic /r/ at word boundaries, especially where one or both vowels is schwa; for example the idea of it becomes the idea-r-of it, Australia and New Zealand becomes Australia-r-and New Zealand, the formerly well-known India-r-Office, and Noel Gallagher singing "Champagne Supernova-r- in the sky". The typical alternative used by RP speakers is to insert a glottal stop where an intrusive R would otherwise be placed.[1]
For non-rhotic speakers, what was historically a vowel plus /r/ is now usually realized as a long vowel. So in Received Pronunciation (RP) and many other non-rhotic accents card, fern, born are pronounced [kɑːd], [fɜːn], [bɔːn] or something similar; the pronunciations vary from accent to accent. This length may be retained in phrases, so while car pronounced in isolation is [kɑː], car owner is [kɑːɹəʊnə]. But a final schwa usually remains short, so water in isolation is [wɔːtə]. In RP and similar accents the vowels /iː/ and /uː/ (or /ʊ/), when followed by r, become diphthongs ending in schwa, so near is [nɪə] and poor is [pʊə], though these have other realizations as well, including monophthongal ones; once again, the pronunciations vary from accent to accent. The same happens to diphthongs followed by R, though these may be considered to end in /ər/ in rhotic speech, and it is the /ər/ that reduces to schwa as usual in non-rhotic speech: tire said in isolation is [taɪə] and sour is [saʊə].[2] For some speakers, some long vowels alternate with a diphthong ending in schwa, so wear may be [wɛə] but wearing [wɛːɹiŋ].
Mergers characteristic of non-rhotic accents
Some phonemic mergers are characteristic of non-rhotic accents. These usually include one item that historically contained an R (lost in the non-rhotic accent), and one that never did so. The section below lists mergers in order of approximately decreasing prevalence.
- panda-pander. In the terminology of Wells (1982), this consists of the merger of the lexical sets commA and lettER. It is found in all or nearly all non-rhotic accents,[3] and is even present in some accents that are in other respects rhotic, such as those of some speakers in Jamaica and the Bahamas.[3] Other possible homophones include area-airier, cheetah-cheater, cornea-cornier, formally-formerly, manna-manner/manor, rota-rotor, schema-schemer, tuba-tuber, custody-custardy and pharma-farmer.
- father-farther. In Wells's terminology, this consists of the merger of the lexical sets PALM and START. It is found in the speech of the great majority of non-rhotic speakers, including those of England, Wales, the United States, the Caribbean, Australia, New Zealand and South Africa. It may be absent in some non-rhotic speakers in the Bahamas.[3] Other possible homophones include alms-arms, balmy-barmy, lava-larva and spa-spar.
- pawn-porn. In Wells's terminology, this consists of the merger of the lexical sets THOUGHT and NORTH. It is found in the same accents as the father-farther merger described above, but is absent from the Bahamas and Guyana.[3] Other possible homophones include awe-or, caulk-cork, gnaw-nor, laud-lord, stalk-stork, talk-torque, taught-tort and thaw-Thor.
- caught-court. In Wells's terminology, this consists of the merger of the lexical sets THOUGHT and FORCE. It is found in those non-rhotic accents containing the pawn-porn merger that have also undergone the horse-hoarse merger. These include the accents of Southern England, Wales, non-rhotic New York City speakers, Trinidad and the Southern hemisphere. In such accents a three-way merger awe-or-ore/oar results. Other possible homophones include bawd-board, flaw-floor, fought-fort, law-lore, paw-pour/pore, raw-roar, sauce-source, saw-sore/soar and Shaw-shore.
- calve-carve. In Wells's terminology, this consists of the merger of the lexical sets BATH and START. It is found in some non-rhotic accents with broad A in words like "bath". It is general in southern England (excluding rhotic speakers), Trinidad, the Bahamas, and the Southern hemisphere. It is a possibility for Welsh, Eastern New England, Jamaican, and Guyanese speakers. Other possible homophones include aunt-aren't, fast-farced and pass-parse.
- paw-poor. In Wells's terminology, this consists of the merger of the lexical sets THOUGHT and CURE. It is found in those non-rhotic accents containing the caught-court merger that have also undergone the pour-poor merger. Wells lists it unequivocally only for the accent of Trinidad, but it is an option for non-rhotic speakers in England, Australia and New Zealand. Such speakers have a potential four-way merger taw-tor-tore-tour.[4] Other possible homophones include Shaw-sure, tawny-tourney and yaw-your.
- batted-battered. This merger is present in non-rhotic accents which have undergone the weak vowel merger. Such accents include Australian, New Zealand, most South African speech, and some non-rhotic English speech. Other possible homophones include arches-archers, chatted-chattered, founded-foundered, matted-mattered, offices-officers, sauces-saucers, splendid-splendo(u)red and tended-tendered.
- dough-door. In Wells's terminology, this consists of the merger of the lexical sets GOAT and FORCE. It may be found in some southern US non-rhotic speech, some speakers of African American Vernacular English, some speakers in Guyana and some Welsh speech.[3] Other possible homophones include coat-court, flow-floor, foe-four/fore, go-gore, hoe-whore, poach-porch, poke-pork, row-roar, show-shore, snow-snore, stow-store, toe-tore and woe-wore.
- show-sure. In Wells's terminology, this consists of the merger of the lexical sets GOAT and CURE. It may be present in those speakers who have both the dough-door merger described above, and also the pour-poor merger. These include some southern US non-rhotic speakers, some speakers of African American Vernacular English, and some speakers in Guyana.[3] Other possible homophones include Poe-poor, toe-tour, and goad-gourd.
- often-orphan. In Wells's terminology, this consists of the merger of the lexical sets CLOTH and NORTH. It may be present in old-fashioned Eastern New England accents,[5] some New York speakers[6] and also in some speakers in Jamaica and Guyana. It was also present in some words in old-fashioned Received Pronunciation. Other possible homophones include moss-Morse and off-Orff.
- God-guard. In Wells's terminology, this consists of the merger of the lexical sets LOT and START. It may be present in non-rhotic accents that have undergone the father-bother merger. These may include some New York accents,[7] some southern US accents,[8] and African American Vernacular English.[9] Other possible homophones include cod-card, hot-heart, lodge-large, pot-part, potty-party, and shop-sharp.
- shot-short. In Wells's terminology, this consists of the merger of the lexical sets LOT and NORTH. It may be present in some Eastern New England accents.[10][11] Other possible homophones include cock-cork, cod-cord, con-corn, odder-order and stock-stork.
- oil-earl. In Wells's terminology, this consists of the merger of the lexical sets CHOICE and NURSE preconsonantally. It was present in older New York accents, but became stigmatized and is sharply recessive in those born since the Second World War.[12] Other possible homophones include adjoin-adjourn, Boyd-bird, coil-curl, oily-early and voice-verse.
In some accents, syllabification may interact with rhoticity, resulting in homophones where nonrhotic accents have centering diphthongs. Possibilities include Korea-career[13], Shi'a-sheer, and Maia-mire,[14] while skua may be identical with the second syllable of obscure.[15]
Distribution of rhotic and non-rhotic accents
Examples of rhotic accents are: Hiberno English, Mid Ulster English, Canadian English and most varieties of American English. Non-rhotic accents include most accents of England, New Zealand, Australia, South Africa.
Most speakers of most of North American English are rhotic, as are speakers from Barbados, Scotland and most of Ireland.
In England, rhotic accents are found in the West Country (south and the west of a line from near Shrewsbury to around Portsmouth), the Corby area, most of Lancashire (north and east of the centre of Manchester), some parts of Yorkshire and Lincolnshire and in the areas that border Scotland. The prestige form, however, exerts a steady pressure towards non-rhoticity. Thus the urban speech of, say, Bristol or Southampton is more accurately described as variably rhotic, the degree of rhoticity being reduced as one moves up the class and formality scales.[17]