ⓘ Voiceless alveolar trill

                                     

ⓘ Voiceless alveolar trill

A voiceless alveolar trill differs from the voiced alveolar trill /r/ only by the vibrations of the vocal cord. It occurs in a few languages, usually alongside the voiced version, as a similar phoneme or an allophone.

Proto-Indo-European *WED turned at the sound of the spelled ⟨ ῥ ⟩, the letter for /R / and accented /sec, in Ancient Greece. It was probably a deaf alveolar trill and became a regular allophone in initial /R / in standard attic Greek which vanished in the modern Greek language.

  • PIE *srew- >, Ancient Greek ῥέω "flow", possibly.