Voiceless retroflex trill

The voiceless retroflex trill is a sound that has been reported to occur as a diaphoneme of /ʂ/ in the Maldivian language.^[1] Although the tongue starts out in a sub-apical retroflex position, trilling involves the tip of the tongue and causes it to move forward to the alveolar ridge; this means that the retroflex trill gives a preceding vowel retroflex coloration the way other retroflex consonants do, but the vibration itself is not much different from an alveolar trill.

Voiceless retroflex trill
ɽ͡r̥
IPA number	125 674 122 402A
Audio sample
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Wahgi has a similar trilled allophone of its lateral flap, [𝼈̥r̥].

Features

Features of the voiceless retroflex trill:

• Its manner of articulation is trill, which means it is produced by directing air over an articulator so that it vibrates.
• Its place of articulation is retroflex, which prototypically means it is articulated subapical (with the tip of the tongue curled up), but more generally, it means that it is postalveolar without being palatalized. That is, besides the prototypical subapical articulation, the tongue can be apical (pointed) or, in some fricatives, laminal (flat).
• Its phonation is voiceless, which means it is produced without vibrations of the vocal cords.
• It is an oral consonant, which means air is allowed to escape through the mouth only.
• It is a central consonant, which means it is produced by directing the airstream along the center of the tongue, rather than to the sides.
• Its airstream mechanism is pulmonic, which means it is articulated by pushing air solely with the intercostal muscles and abdominal muscles, as in most sounds.

Occurrence

Language		Word	IPA	Meaning	Notes
Dhivehi	Addu[2]		/koɽ̊͜r̊ani/	'cutting'	May be a flap. Corresponds to /ʂ/ in other dialects. See Dhivehi phonology.