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In phonetics and phonology, a semivowel, glide or semiconsonant is a sound that is phonetically similar to a vowel sound but functions as the syllable boundary, rather than as the nucleus of a syllable. [1] Examples of semivowels in English are y and w in yes and west, respectively.
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 a combination of two adjacent vowel sounds within the same syllable. [2]
In addition to these, the semivowels /w/ and /j/ can be combined (either before, after, or both) with most vowels. One view considers that only /e̯a/ and /o̯a/ can follow an obstruent-liquid cluster such as in broască ('frog') and dreagă ('to mend') [5] and form real diphthongs, whereas the rest are merely vowel–glide sequences. [6]
A sonority hierarchy or sonority scale is a hierarchical ranking of speech sounds (or phones).Sonority is loosely defined as the loudness of speech sounds relative to other sounds of the same pitch, length and stress, [1] therefore sonority is often related to rankings for phones to their amplitude. [2]
The semivowels /e̯ i̯ o̯ u̯/ may all form the glide part of a diphthong. The total number of diphthongs is not established, with bounds at 17 and 31. Several vowel combinations can be considered true monosyllabic diphthongs, made up of the main vowel (the nucleus) and the trailing vowel (the off-glide).
One use of the word semivowel, sometimes called a glide, is a type of approximant, pronounced like a vowel but with the tongue closer to the roof of the mouth, so that there is slight turbulence. [ citation needed ] In English, /w/ is the semivowel equivalent of the vowel /u/ , and /j/ (spelled "y") is the semivowel equivalent of the vowel /i ...
The vowel nuclei may be preceded by a glide /j, w, ɥ/, and may be followed by a coda /i, u, n, ŋ/. The various combinations of glide, vowel, and coda have different surface manifestations, as shown in the tables below. Any of the three positions may be empty, i.e. occupied by a null meta-phoneme ∅.
The correlation between semivowels and vowels is strong enough that cross-language differences between semivowels correspond with the differences between their related vowels. [ 7 ] Vowels and their corresponding semivowels alternate in many languages depending on the phonological environment, or for grammatical reasons, as is the case with ...