兄きょう弟だい弟で子しきょうだいでしMeanings1nounfellow pupil; fellow apprenticeRefers to someone who studies or trains under the same teacher or master, especially in traditional arts, crafts, or martial disciplines.彼かれは私わたしの兄きょう弟だい弟で子しで、同おなじ師し匠しょうに師し事じして