いっしんどうたい 一心同体 LinksSentence search for 一心同体Sentence search for いっしんどうたいKanji details for 一, 心, 同 and 体Edit in JMdict Noun1. being one in body and soul; of one flesh; two hearts beating as oneYojijukugo (four character compound) Discussions Log in to talk about this word.