奥さん
おくさん · okusan · JLPT N5 · noun
wife
👰 奥 = inner part of the house + さん: the lady of the interior
奥 (oku) means the back or inner part of a house, where the mistress of a household traditionally lived. Add the polite さん and you get an honorific for another man's wife. Never use it for your own wife: that is 妻 or 家内.