舅きゅう姑こきゅうこMeanings1nounparents-in-lawRefers to one's spouse's parents, i.e., father-in-law and mother-in-law together. This term is formal and somewhat dated; in modern Japanese, 義理の両親 or 義父母 are more common.舅きゅう姑ことの同どう居きょは、昔むかしは当あたり前まえだった。Living with one's parents-in-law was once the norm.