Tanım
•elder brother and younger sister
Etimoloji
From 兄 (kei, “elder brother”, 漢音 (kan'on)) + 妹 (“younger sister”, 呉音 (goon)), from Middle Chinese 兄妹 (MC xjwaeng mwojH). Compare 兄弟 (kyōdai, “elder brother and younger brother”), 姉弟 (shitei, “elder sister and younger brother”).