Vowel in Creek, the letter "V" stands for . There is not necessarily a direct one-to-one correspondence between the vowel sounds of a language and the vowel letters. Many languages that use a form of the Latin alphabet have more vowel sounds than can be represented by the standard set of five vowel letters. In English spelling, the five letters "A" "E" "I" "O" and "U" can represent a variety of vowel sounds, while the letter "Y" frequently represents vowels (as in e.g., "gym", "happy", or the diphthongs in "cry", "thyme"); "W" is used in representing some diphthongs (as in "cow")
Open-mid front rounded vowel this article. There is no dedicated IPA diacritic for compression. However, the compression of the lips can be shown by the letter as (simultaneous and labial compression) or ( modified with labial compression). The spread-lip diacritic may also be used with a rounded vowel letter as an "ad hoc" symbol, but 'spread' technically means unrounded. "Note: Because front rounded vowels are assumed to have compression, and few descriptions cover the distinction, some of the following may actually have protrusion." Catford notes that most languages with rounded front and back vowels use distinct types of labialization, protruded back vowels and compressed