女婿
nǚ xu · HSK 7
daughter's husband
🤵 女 daughter + 婿 husband = the man married to your daughter
婿 already means a husband-in-law; pairing it with 女 (daughter) pins it down to the daughter's side, so 女婿 is specifically your daughter's husband. The sound xu is unstressed, almost swallowed after nǚ.
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.