The letter "ü" is a character used in several languages, including German, Turkish, and Hungarian. It represents a specific vowel sound that is not found in English. In German, for example, "ü" is pronounced like the "u" in "blue," but with the lips rounded and the tongue positioned higher in the mouth. In German orthography, "ü" can appear in various words, such as "über" (meaning "over" or "above") and "München" (the name of the city Munich). The letter is often used to indicate a change in pronunciation, distinguishing it from the regular "u."