S̀ (minuscule: s̀) is a letter of the Latin alphabet, formed from S with the addition of a grave accent. It is used in Ugaritic transliteration and the SICC orthography for the Dakota language, representing /ʃ/.
Encodings
The HTML codes are:  for S̀ (upper case) List of Latin-based precomposed UNICODE characters with description of their elements
See also Grave accent Z̀ ś
References