Wikipedia doesn't give a citation for this, but I knew instantly what it meant: "Voiced and voiceless interdental fricatives [ð̟, θ̟] appear in American English as the initial sounds of words like 'then' and 'thin'. In British English, these consonants are more likely to be dental [ð, θ]."
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Date: 2016-07-10 02:48 am (UTC)