Caron

In typography, a caron (ˇ) is a diacritical mark used over certain letters in some languages to indicate a change in pronunciation or tone. It is also known as a háček, which means "little hook" in Czech. The caron is most commonly used in Czech, Slovak, and other Slavic languages to indicate a change in the pronunciation of a vowel. For example, in Czech, the letter "ě" with a caron is pronounced as a "ye" sound, while the letter "e" without the caron is pronounced as an "eh" sound. The caron is also used in some other languages that have adopted the Latin alphabet, such as Slovenian, Croatian, and others.