Latin Small Letter Upsilon

Latin Small Letter Upsilon at U+028A is a phonetic letter for a near-close, near-back rounded vowel, the sound many English speakers hear in words like “put” or “foot.” It is a printable character in the IPA Extensions block and is used mainly as a transcription symbol rather than as an ordinary alphabetic letter. Its primary role is in the International Phonetic Alphabet, where it denotes the vowel conventionally described as near-high back rounded. Dictionaries, pronunciation guides, language textbooks, and linguistic papers use it in broad or narrow transcriptions, such as English /pʊt/ for “put” or /bʊk/ for “book” in accents that have this vowel. The symbol also appears in phonology, dialectology, speech therapy, and second-language teaching when comparing vowel systems. It helps distinguish this vowel from /u/, the closer vowel of “goose,” and from /ʌ/ or /ə/ in analyses of English and other languages with similar rounded back vowels. Because its shape resembles Greek upsilon or a small capital-like u, it is sometimes mistaken for ordinary Latin letters or Greek characters in copied text. That distinction matters in searchable phonetic data, corpus work, and dictionary entries where each symbol has a specific IPA value.