[z]→[dz]Certainty: 5/5Commonality: 3/5
Voiced alveolar fricative to Voiced alveolar affricate
Affrication of voiced alveolar fricative [z] to voiced alveolar affricate [dz], typically as fortition in prosodically strong positions or post-nasal environments. The mechanism involves the acquisition of a pre-stop closure before the fricative release, requiring extra articulatory effort available at the start of an utterance or after a nasal. The shift is primarily allophonic across the languages where it is best documented: Standard Japanese and the Bantu prenasalized consonant system.
Phonetic Effects
Affrication, Fortition
Language Examples
/z/ in utterance-initial or post-nasal position→[dz] (affricate allophone)— In Standard Japanese, /z/ has two main allophones: the fricative [z] and the affricate [dz]. Corpus studies show [dz] appears ~80% of the time after a pause (utterance boundary), ~60% after the moraic nasal /N/, and ~74% after the moraic obstruent /Q/. Fricative [z] is favoured in faster or intervocalic speech. The affricate realization is considered the 'careful' or 'strong-position' allophone.
/z/ after nasal class prefix (prenasalized /nz/)→[ndz] (prenasalized voiced affricate)— In Swahili, the prenasalized consonant cluster /nz/ is realized as [ndz], with a homorganic stop inserted between the nasal and the fricative. Examples include 'nzi' (housefly) [ndzi] and prenasalized stems with /z/ initials. This is a standard Bantu post-nasal affrication process: the nasal triggers a stop closure that converts the following fricative into an affricate.
Related Transformations
More Allophony Shifts
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