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")
Thematic vowel Thematic vowel In Indo-European studies, a thematic vowel or theme vowel is the vowel or from ablaut placed before the ending of a Proto-Indo-European (PIE) word. Nouns, adjectives, and verbs in the Indo-European languages with this vowel are thematic, and those without it are athematic. Used more generally, a thematic vowel is any vowel found at the end of the stem of a word. PIE verbs and nominals (nouns and adjectives) consist of three parts: The thematic vowel, if present, occurs at the end of the suffix (which may include other vowels or consonants) and before the ending: Athematic forms,