[ʑ]→[ɕ]Certainty: 4/5Commonality: 2/5

Voiced alveolo-palatal fricative to Voiceless alveolo-palatal fricative

Written voiced bzh- in Classical Tibetan corresponds to Lhasa voiceless ɕ with a low tone: bzhi 'four' is /ɕi˩˨/. Voicing of the initial was transferred to tone.

Phonetic Effects

Devoicing, Tonogenesis, Prefix Loss

Language Examples

Lhasa Tibetan Tibetic

bzhi "four" [bʑi]→/ɕi˩˨/— From Proto-Sino-Tibetan *pV-lij (Wiktionary).

More Tibeto-Burman Shifts

[tʰ] → [d] — Deaspiration [tsʰ] → [dz] — Voicing [b] → [∅] — Lenition [ẽ] → [i] — Denasalization [g] → [∅] — Deletion

Sources & References

https://en.wiktionary.org/wiki/%E0%BD%96%E0%BD%9E%E0%BD%B2

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