1. PronounciationPronunciation (noun) : the way in which we pronounce a wordPronounce (verb) : to make the sound of a word [1]2. Vowel soundVowel is a speech sound made when air is free to pass through the mouth with little or no obstruction, as in sounds made with the letters a, e, i, o, u, and sometimes yA vowel letter can represent different vowel sounds: hat [hæt], hate [heit], all [o:l], art [a:rt], any ['eni].The same vowel sound is often represented by different vowel letters in writing: [ei] they, weigh, may, cake, steak, rain.In phonetics, a vowel is a sound in spoken language, such as an english ah! [ɑː] or oh! [oʊ], pronounced with an open vocal tract so that there is no build-up of air pressure at any point above the glottis. This contrasts with consonants, such as english sh! [ʃː], where there is a constriction or closure at some point along the vocal tract. A vowel is also understood to be syllabic: an equivalent open but non-syllabic sound is called a semivowel. [2]The word vowel comes from the latin word vocalis, meaning "vocal" ("relating to voice"). In english, the word vowel is commonly used to mean both vowel sounds and the written symbols that represent them.A vowel sound whose quality doesn't change over the duration of the vowel is called a monophthong. Monophthongs are sometimes called "pure" or "stable" vowels. A vowel sound that glides from one quality to another is called a diphthong, and a vowel sound that glides successively through three qualities is a triphthong.All languages have monophthongs and many languages have diphthongs, but triphthongs or vowel sounds with even more target qualities are highly rare cross-linguistically. English has all three types: the vowel sound in hit is a monophthong/ɪ/, the vowel sound in boy is in most dialects a diphthong/ɔɪ/, and the vowel sounds of flower,/aʊər/, form a triphthong or disyllable, depending on dialect.In phonology, diphthongs and triphthongs are distinguished from sequences of monophthongs by whether the vowel sound may be analyzed into different phonemes or not. For example, the vowel sounds in a two-syllable pronunciation of the word flower (/flaʊər ˈ/) phonetically form a disyllabic triphthong, but are phonologically a sequence of a diphthong (represented by the letters 〈 ow 〉) and a monophthong (represented by the letters 〈 er 〉). Some linguists use the terms diphthong and triphthong only in this phonemic sense. [3]
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