語言互動與方言交界：論福建西南閩客交界帶方言群遇攝三等字今讀-y韻母的現象

本論文討論福建西南閩客交界帶方言群遇攝三等今讀-y或相關韻母的由來與歷史發展。我們依序比較福建閩語、客類方言、混合方言的語音表現，並參考與語言現象相關的歷史、地理與族群關係，提出本處客類方言的y韻母是「共同新客家話」*iu的後續發展。因地處客家邊陲區，核心方言*iu>i的音變擴散波影響力弱，且此處過去曾有大量的共同新客家、共同畲話雙語者，受到共同畲話遇攝三等讀*y的刺激，發展出*iu>y的演變，有別於核心客家話。這種變化是明清以後，客家、畲族重新回到共生親密關係後，才逐漸出現的。

This paper discusses the origin and historical development of the -y finals in Yu rime-group-III（遇攝三等）in the dialects at the Hakka-Min boundary in southwestern Fujian. We sequentially compare the phonetic features of Min dialects, Hakka-like dialects, and mixed dialects in Fujian. By referencing the historical, geographical, and ethnic relationships related to these linguistic phenomena, we propose that the -y finals in these Hakka-like dialects are a further development of the ''Common Neo-Hakka'' *iu. Due to the region's position on the periphery of Hakka areas, the influence of the core dialectal sound change from *iu to i is weak. In addition, the area historically had many bilingual speakers of ''Common Neo-Hakka'' and ''Common-She（畲）.'' Stimulated by the *y finals in Yu rime-group-III（遇攝三等）in ''Common- She（畲）,'' a distinct change from the core Hakka language occurred: *iu developed into y. This change gradually emerged after the Ming and Qing dynasties when the Hakka and She（畲）peoples returned to a close symbiotic relationship.