zài / chuán / tǒng / chēng / wèi / zhōng / xiōng / dì / de / qī / zi / bǐ / cǐ / chēng / wéi / tóng / sì

在传统称谓中，兄弟的妻子彼此称为同姒。

In traditional kinship terms, the wives of brothers are called sisters-in-law to each other.