동서
dongseo · Sibling-in-law by marriage (spouses of siblings)
Wives of brothers to each other; also husbands of sisters to each other.
Where in the familymy husband's brother → his wife (or my wife's sister → her husband)
Calling themThe wife of the older brother is called 형님; the younger one is called 동서.
Referring to themTo others, 동서 or 손위 동서·손아래 동서.
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