くちさい 口が裂けても言えない Show inflections LinksSentence search for 口が裂けても言えないSentence search for くちがさけてもいえないKanji details for 口, 裂 and 言Edit in JMdict Expressions (phrases, clauses, etc.), I-adjective (keiyoushi)1. (I) won't say anything no matter what; unwilling to tell even under threatこのくちがさけてもい口が裂けても言えません!I will never tell! Discussions Log in to talk about this word.