Ŝ or ŝ (S circumflex) is a consonant in Esperanto orthography, representing the sound [ʃ].
Esperanto orthography uses a diacritic for all four of its postalveolar consonants, as do most Latin-based Slavic alphabets (Polish is the most notable exception). Letters and digraphs that are similar to ŝ and represent the same sound include Czech, Slovak, Slovene, Serbian Latin, and Croatian š, russian ш and English sh.
It is used in ISO 9:1995 (standard of transliteration into Latin characters of Cyrillic characters) for letter Щ.
See also