The letter "Č" is a character used in several Slavic languages, including Czech, Slovak, and Serbo-Croatian. It represents a voiceless postalveolar fricative sound, similar to the English "ch" in "chocolate." The letter is formed by adding a caron (ˇ) to the letter "C," distinguishing it from the standard "C." In the Czech alphabet, "Č" is the fourth letter and is pronounced as "ch." It plays a crucial role in the phonetic structure of the language, affecting the meaning of words. For example, "čaj" means "tea," while "caj" (without the caron) does not exist in Czech.