原始阿尔泰语
构拟 > 音素对应 > 元音

元音和谐遍布阿尔泰语系：绝大多数突厥语和蒙古语，及部分通古斯语都有元音和谐。朝鲜语的元音和谐后来消失了，上古日语的则存在争议。元音和谐也常见于相邻的乌拉尔语系，是用于论证乌拉尔-阿尔泰语系的论据。无论如何，Starostin et al. (2003)构拟的原始阿尔泰语则是缺乏元音和谐的，据他们所说每支后代语言中后起的元音和谐是首音节的元音被第二个音节的元音同化的过程。“因此，这里的情况实际上非常像日耳曼语族[参见日耳曼语元音变音]或东高加索纳克语的情形，非词首元音的音质只能基于第一个音节的元音变音来复原。”(Starostin et al. 2003:91)
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1 2 3 4 5 6 7 8 9 10 11  前为唇音时
1 2 3 4  后接颤音或边音时
1 2 3 4  与唇音相邻时
1 2 3  前为擦音时