[ʃ]→[r]Certainty: 4/5Commonality: 2/5

Voiceless postalveolar fricative to Alveolar trill

The shift from the postalveolar fricative [ʃ] to a rhotic sound [r] is a form of rhotacism. It typically occurs in syllable-final positions or as part of a broader systemic weakening of sibilants, particularly in languages where the [ʃ] is already slightly retroflexed or apical in nature.

Phonetic Effects

Rhotacism, Lenition, Retroflexion

Language Examples

Vietnamese Dialects Austroasiatic

[ʂ] / [ʃ] (historical)→[r] / [z]— Historical retroflex sibilants in some dialects have shifted toward rhotic or alveolar fricative realizations.

Related Transformations

Reverse

More Lenition Shifts

[a] → [∅] — Elision [b] → [p] — Voice Loss [b] → [v] — Spirantization [tɕ] → [ʃ] — De-affrication [tɕ] → [ɕ] — Lenition

Sources & References

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