Th-alveolarization

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Th-alvealarization is a process that occurs in some African varieties of English where the dental fricatives /ð, θ/ merge with the alveolar stops /z, s/.

For some speakers of African American Vernacular English, /θ/ is alveolarized to /s/ when it occurs at the end of a syllable and within a word before another consonant leading to such pronunciations as the following.^[1]