noun🔗Share兄弟姉妹の孫A grandson of one's sibling; a son of one's nephew or niece. (Brother's grandson: fraternal grandnephew. Sister's grandson: sororal grandnephew.)"My brother's grandson, a bright young grandnephew, is starting school next week. "私の兄弟の孫である、聡明な若い甥っ子が、来週から学校に通い始めます。familyChat with AIVocabulary GamePractice Reading