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''Th''-debuccalization is a process in varieties of Scots and Scottish English where a voiceless dental fricative (spelled ''th'') at the beginning of a word and between vowels becomes the voiceless glottal fricative .〔https://books.google.com/books?id=FJ7dAgAAQBAJ&pg=PA48&lpg=PA48&dq=Th-debuccalization&source=bl&ots=1W9kMsAB1l&sig=2AySeojrJAExh74uHfHAHx7lBQs&hl=gd&sa=X&ved=0CDgQ6AEwCGoVChMI-MmEx7bTxwIVTOwUCh1pVAva#v=onepage&q=Th-debuccalization&f=false〕 It is a stage in the process of lenition. Th-debuccalization occurs mainly in Glasgow and across the Central Belt. A common example is for ''think''. This feature is becoming more common in these places over time, but is still variable. In word final position, is used, as in standard English. The existence of local for in Glasgow complicates the process of th-fronting there, a process which gives for historical . Unlike in the other dialects with th-fronting, where solely varies with , in Glasgow, the introduction of th-fronting there creates a three-way variant system of , and . Use of marks the local educated norms (the regional standard), while use of and instead mark the local non-standard norms. is well known in Glasgow as a vernacular variant of when it occurs word-initially and intervocalically, while has only recently risen above the level of social consciousness. Given that th-fronting is a relatively recent innovation in Glasgow, it was expected that linguists might find evidence for lexical diffusion for and the results found from Glasgow speakers confirm this. The existing and particular lexical distribution of th-debuccalization imposes special constraints on the progress of th-fronting in Glasgow. In accents with th-debuccalization, the cluster becomes giving these dialects a consonant cluster that doesn't occur in other dialects. The replacement of with leads to pronunciations like: * three - * throw - * through, threw - * thrash - * thresh - * thrown, throne - * thread - * threat - ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Th-debuccalization」の詳細全文を読む スポンサード リンク
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