Th-stopping

Th-stopping is the realization of the dental fricatives [θ, ð] as stops—either dental or alveolar—which occurs in several dialects of English. In some accents, such as of Indian English and middle- or upper-class Irish English, they are realized as the dental stops [t̪, d̪] and as such do not merge with the alveolar stops /t, d/; thus, for example, tin ([tʰɪn] in Ireland and [ʈɪn] in India) is not a homophone of thin [t̪ʰɪn]. In other accents, such as varieties of Caribbean English, Nigerian English, Liberian English, and older, rural, or working-class Irish English, such pairs are indeed merged. Variation between both dental and alveolar forms exists in much of the working-class English speech of North America and sometimes southern England. It is also common for babies and toddlers, who are still learning to talk and/or haven't fully grown their front teeth capable of producing the Th sound. Th-stopping occurred in all continental Germanic languages, resulting in cognates such as German die for "the" and Bruder for "brother".