そくおんびん 促音便 LinksSentence search for 促音便Sentence search for そくおんびんKanji details for 促, 音 and 便Edit in JMdict Noun1. nasal sound change (generation of geminate consonant, primarily a geminate 't' from vowel stems ending in 'i')Linguistics, See also 撥音便 Discussions Log in to talk about this word.