The circumflex accent. The circumflex accent is an inverted caron, it's alternative name is caret, from Latin 'it lacks', since this mark was also used by proofreaders to indicate that something should be inserted in a text. So this is the caret: ĉ, and this is the caron: č.

A caron ( ˇ ) or haček (from Czech: háček), is a diacritic. This is a special symbol that is written over some letters to show that they are pronounced differently. Some other names for the caron are: wedge, inverted circumflex, and inverted hat. ˇ

It is also used to decorate symbols in mathematics, where it is often pronounced /ˈtʃɛk/ ("check"). The caron is shaped approximately like a small letter "v".

The grapheme Čč (Latin C with caron, also known as háček in Czech, mäkčeň in Slovak, kvačica in Serbo-Croatian, and strešica in Slovene) is used in various contexts, usually denoting the voiceless postalveolar affricate consonant [t͡ʃ] like the English ch in the word chocolate.