laws of phonetic change音变规律
successive phonetic change语音流变
derivation by phonetic change音变构词
traits of phonetic change音变特点
dispersive phonetic change离散式音变
historical phonetic change历史音变
Phonetic change ideograph音变表意
derivation phonetic change音变构词
folded phonetic change叠置式音变
It is argued that "li (哩)" comes into being after the modal particle " li (里) " , and " ya (呀) " is a phonetic word which results from a phonetic change of the modal particle "ye (也)" .
“哩”是语气词“裹”的后起字，“呀”则是语气词“也”发生音变后的后起记音字。
参考来源 - 元杂剧语气词研究