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American English pronunciation of "no highway cowboys" /noʊ ˈhaɪweɪ ˈkaʊbɔɪz/, showing five diphthongs: / oʊ, aɪ, eɪ, aʊ, ɔɪ / A diphthong (/ ˈ d ɪ f θ ɒ ŋ, ˈ d ɪ p-/ DIF-thong, DIP-; [1] from Ancient Greek δίφθογγος (díphthongos) 'two sounds', from δίς (dís) 'twice' and φθόγγος (phthóngos) 'sound'), also known as a gliding vowel or a vowel glide, is ...
In Old English, two forms of harmonic vowel breaking occurred: breaking and retraction and back mutation.. In prehistoric Old English, breaking and retraction changed stressed short and long front vowels i, e, æ to short and long diphthongs spelled io, eo, ea when followed by h or by r, l + another consonant (short vowels only), and sometimes w (only for certain short vowels): [3]
Although the Old English diphthongs merged into monophthongs, Middle English began to develop a new set of diphthongs.Many of these came about through vocalization of the palatal approximant /j/ (usually from an earlier /ʝ/) or the labio-velar approximant /w/ (sometimes from an earlier voiced velar fricative [ɣ]), when they followed a vowel.
The following table shows the 24 consonant phonemes found in most dialects of English, plus /x/, whose distribution is more limited. Fortis consonants are always voiceless, aspirated in syllable onset (except in clusters beginning with /s/ or /ʃ/), and sometimes also glottalized to an extent in syllable coda (most likely to occur with /t/, see T-glottalization), while lenis consonants are ...
A simplified diagram of Canadian raising (Rogers 2000:124).Actual starting points vary. Canadian raising (also sometimes known as English diphthong raising [1]) is an allophonic rule of phonology in many varieties of North American English that changes the pronunciation of diphthongs with open-vowel starting points.
For example, vowels were often lengthened in late Old English before /ld/, /nd/, /mb/, and vowels changed in complex ways before /r/ throughout the history of English. Vowels were diphthongized in Middle English before /h/ , and new diphthongs arose in Middle English by the combination of vowels with Old English w , g /ɣ/ → /w/ , and ġ /j/ .
Many exceptional outcomes occurred in particular environments, e.g. vowels were often lengthened in late Old English before /ld, nd, mb/; vowels changed in complex ways before /r/, throughout the history of English; vowels were diphthongised in Middle English before /h/; new diphthongs arose in Middle English by the combination of vowels with ...
This table omits the history of Middle English diphthongs; see that link for a table summarizing the developments. The table is organized around the pronunciation of Late Middle English c. 1400 AD (the time of Chaucer) and the modern spelling system, which dates from the same time and closely approximates the pronunciation of the time.