Ĉ

Ĉ or ĉ (C circumflex) is a consonant in Esperanto orthography, representing the sound [t͡ʃ].

It is based on the letter c. Esperanto orthography uses a diacritic for all four of its postalveolar consonants, as do the Latin-based Slavic alphabets. Letters and digraphs that are similar to ĉ and represent the same sound include Slovene č, Polish digraph cz, English and Spanish digraph ch, French trigraph tch, Norwegian trigraph tsj, German tetragraph tsch, and Italian c before i or e.

Ĉ is the fourth letter of the Esperanto alphabet. Although it is written as cx and ch respectively in the x-system and h-system workarounds, it is normally written as C with a circumflex: ĉ.