Your sister and your wife are sisters-in-law to each other.
Your husband's brother's wife or your husband's sister's husband have no relation to you. Your brother's or sister's wife or husband is called a sister or brother in-law. You are only related by the marriage between them and your sibling.
she would be your sister in law
sister in law.
Your brother's wife is called your "sister-in-law." If you are a male, you are her brother-in-law and if you are female, you are her sister-in-law.
Your spouse's sister is your sister-in-law and your spouse's brother is your brother-in-law. The English language has no term for a relationship between you and the wife of your brother-in-law or the husband of your sister-in-law. The best you can do in English is to use "my sister-in-law's husband" and similar phrases.
No relation...lol
Your brother's wife is your sister-in-law, but is not related to your wife. Your wife might refer to your brother's wife as "my brother-in-law's wife" or as "my husband's sister-in-law."
that's fine because the only relation between you two is through marriage, not blood
Probably your niece-in-law.
Sister in law, once removedAnother answer:That was funny. But the correct answer is: Wife's former (or ex) sister-in-law.
There is no relation between you, and your biological Uncle's wife's sibling's daughter. Your Uncle's wife is technically an "Aunt in law", though as routine courtesy is simply called "Aunt". Her brother/sister, if your family and her family are that close, could be regarded as an "Uncle/Aunt in law", as a stretch. Thus the daughter of him/her could be thought of as a "cousin in law" to you. But this is all a matter of courtesy, there is no biological or legal relation.
Your wife's sister is called your "sister in-law".