大だい便べんだいべんCommon wordJLPTN1Freq.FrequencyTop 50,000Meanings1nounfeces; stool; excrementFormal or medical term for human feces. In everyday conversation, うんち or うんこ are more common.健けん康こう診しん断だんで大だい便べんの検けん査さをした。I had a stool test at my health checkup.大だい