The grapheme Ř, ř is a letter used in the alphabets of the Czech and Upper Sorbian languages, as well as several other languages written in the Latin script. It was also used in proposed orthographies for the Silesian language. It has been used in academic transcriptions for rhotic sounds.
The Unicode glyphs are U+0158 Ř LATIN CAPITAL LETTER R WITH CARON and U+0159 ř LATIN SMALL LETTER R WITH CARON. Either can also be represented using the combining character U+030C ◌̌ COMBINING CARON.
To pronounce this sound, Czech people usually need a speech therapist to help them say this sound.