[f]→[ɸ]Certainty: 5/5Commonality: 3/5

Voiceless labiodental fricative to Voiceless bilabial fricative

Shift of labiodental fricative [f] to bilabial fricative [ɸ], representing bilabialization of fricatives. Ewe (Kwa, Niger-Congo) maintains a phonemic contrast between labiodental fricatives /f, v/ and their bilabial counterparts /ɸ, β/, a rare feature in world languages.

Phonetic Effects

Bilabialization

Language Examples

Ewe Kwa

/f/ (labiodental)→[ɸ] (bilabial)— Ewe contrasts labiodental fricatives /f, v/ with bilabial fricatives /ɸ, β/, one of few languages with this distinction. The bilabial variant represents an articulatory variation or allophonic realization in certain phonological contexts, or may be a separate phoneme depending on analysis. Both are written distinctly in Ewe orthography (f vs. ƒ).

Japanese Japonic

/h/ (voiceless)→[ɸ] (bilabial fricative)— In Japanese, the voiceless fricative before /u/ is realized as bilabial [ɸu] rather than labio-dental [fu], representing a natural phonological interaction with the rounded vowel.

Related Transformations

Reverse Voicing Voicing bilabial

More Japonic Shifts

[d] → [dʑ] — Palatalization [i] → [∅] — Elision [k] → [g] — Voicing [ɴ] → [m] — Assimilation [ɴ] → [n] — Assimilation

Sources & References

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