Voiceless alveolar trill

Voiceless alveolar trill
r̥
IPA number	122 402A
Encoding
X-SAMPA	r_0

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 *sr developed into a sound spelled ⟨ῥ⟩, with the letter for /r/ and the diacritic for /h/, in Ancient Greek. It was probably a voiceless alveolar trill and became the regular word-initial allophone of /r/ in standard Attic Greek that has disappeared in Modern Greek.

• PIE *srew- > Ancient Greek ῥέω "flow", possibly [r̥é.oː]

IPA: Pulmonic consonants [edit]
Place → Labial Coronal Dorsal Laryngeal Manner ↓ Bi­labial Lab-den. Ling-lab. Den. Alv. Pst-alv. Retro. Pal. Vel. Uvul. Pharyn. Glottal Nasal m̥ m ɱ n̼ n̪ n̥ n n̠ ɳ̊ ɳ ɲ̊ ɲ ŋ̊ ŋ ɴ Stop p b p̪ b̪ t̼ d̼ t̪ d̪ t d t̠ d̠ ʈ ɖ c ɟ k ɡ q ɢ ʡ ʔ Sibilant affricate t̪s̪ d̪z̪ ts dz t̠ʃ d̠ʒ ʈʂ ɖʐ t̠ɕ d̠ʑ Non-sibilant affricate pɸ bβ p̪f b̪v t̪θ d̪ð tɹ̝̊ dɹ̝ t̠ɹ̠̊˔ d̠ɹ̠˔ cç ɟʝ kx ɡɣ qχ ɢʁ ʡʜ ʡʢ ʔh Sibilant fricative s̪ z̪ s z ʃ ʒ ʂ ʐ ɕ ʑ Non-sibilant fricative ɸ β f v θ̼ ð̼ θ ð θ̠ ð̠ ɹ̠̊˔ ɹ̠˔ ɻ̊˔ ɻ˔ ç ʝ x ɣ χ ʁ ħ ʕ h ɦ Approximant β̥˕ ɸ̬˕ ʋ̥ ʋ θ̞ ð̞ ɹ̥ ɹ ɹ̠ ɻ̊ ɻ j̊ j ɰ̊ ɰ ʁ̞ ʕ̞ ʔ̞ Tap/flap ⱱ̟ ⱱ ɾ̼ ɾ̪ ɾ̥ ɾ ɾ̠ ɽ̊ ɽ ɢ̆ ʡ̆ Trill ʙ̥ ʙ r̼ r̪ r̥ r r̠ ɽr̥ ɽr ʀ̥ ʀ ʜ ʢ Lateral affricate tɬ dɮ ʈɭ̊˔ ɖɭ˔ cʎ̝̊ ɟʎ̝ kʟ̝̊ ɡʟ̝ Lateral fricative ɬ̪ ɮ̪ ɬ ɮ ɭ̊˔ ɭ˔ ʎ̝̊ ʎ̝ ʟ̝̊ ʟ̝ Lateral approximant l̪ l̥ l l̠ ɭ̊ ɭ ʎ̥ ʎ ʟ̥ ʟ ʟ̠ Lateral tap/flap ɺ ɭ̆ ʎ̆ ʟ̆
Symbols to the right in a cell are voiced, to the left are voiceless. Shaded areas denote articulations judged to be impossible.