イ音おん便びん

noun

i-onbin; euphonic change to 'i'

Technical term in Japanese linguistics referring to the historical sound change where certain morae (ki, gi, shi, ri) become 'i' in specific grammatical contexts, such as verb conjugations.

• 「書かきて」が「書かいて」になるのはイ音おん便びんの例れいです。

  The change from 'kakite' to 'kaite' is an example of i-onbin.