The Origin and Evolution of Prenasalized and Pre-glottalized Initials in Kam-Sui Languages
Prenasalized and pre-glottalized plosive(implosive)initials are still retained in some Kam-Sui languages,which serve as distinctive consonant characteristics in this language branch.Through analysis of sound correspondences between related words in Kam language data newly obtained and Sui language data from published sources,we argue that the prenasalized and pre-glottalized plosives in modem Kam-Sui languages originate from prenasalized consonant clusters in Proto-Kam-Sui,and explain related sound changes from Proto-Kam-Sui to modem Kam-Sui languages and dialects.The presence or absence of prenasalized plosives is the biggest difference between Proto-Kam and Proto-Sui,and is also the cause for phonetic differences of related words in modem Kam-Sui languages.These differences can be mainly attributed to nonlinear sound changes of consonant cluster initials in Proto-Kam-Sui.
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