The raised-non sonorant alveolar trill of Czech is a rare consonant sound. It is produced by simultaneously rolling the tongue and creating a fricative without vocal fold vibration. In Czech it is represented by the letter ř.
Many Czech words have the consonant. It occurs in words such as řeka (river), dveře (door), tři (three) and lékař (doctor). The raised non-sonorant alveolar trill of Czech can occur in all word positions: initial, medial and final.
The raised non-sonorant alveolar trill no longer occurs in Polish, but it once did. Though Slovak is closely related to Czech, it does not occur in Slovak. The raised non-sonorant alveolar trill of Czech is a rare consonant that is both a fricative and a trill.