～女
～じょ · ～jo · JLPT N2 · noun
sister
👧 女 = woman; 長女 chōjo = eldest daughter, 次女 jijo = second daughter
女 is the kanji for woman, read jo in compounds like 女性 josei. As a suffix after a number it ranks daughters or sisters by birth order: 長女 eldest, 次女 second, 三女 sannjo third. The male version is ～男 nan: 長男 chōnan.
女 — pictograph of a kneeling woman
女 is a pictograph originating in oracle bone script, depicting a person kneeling with arms crossed in front, a posture associated with women in ancient China. Over time the form was simplified and squared off into the modern character. Its core meaning of 'woman' or 'female' has remained stable for over three thousand years.