sister-in-law
🇺🇸
/ˈsɪstər ɪn lɔː/
🇬🇧
/ˈsɪstər ɪn lɔː/
a woman related to you by marriage, such as your spouse's sister or your sibling's wife
My sister-in-law is coming to visit us this weekend, as she is married to my brother.