Where does “促音便” come from?

促音便 (Japanese) comes from Japanese 促音 — a geminate consonant; the kana character thereof:...

促音便 (Japanese): a form of euphony whereby certain historical morae became sokuon before a stop, especially before

Definitions

  1. a form of euphony whereby certain historical morae became sokuon before a stop, especially before

Ancestry of “促音便”, step by step

促音便 traces back through two separate lines of ancestry.

via Japanese 促音

StepLanguageWordMeaning
1Japanese促音a geminate consonant; the kana character thereof:...

via Japanese 音便

StepLanguageWordMeaning
1Japanese音便euphony sound change
Every word from Japanese 促音
促音便 — Etymology, Origin & Word History | Etymology Explorer