ひざわら 膝が笑う Show inflections LinksSentence search for 膝が笑うSentence search for ひざがわらうKanji details for 膝 and 笑Edit in JMdict Expressions (phrases, clauses, etc.), Godan verb with 'u' ending1. to have one's knees be about to give wayIdiomatic expression Discussions Log in to talk about this word.