Your brother's wife is your sister-in-law. Your spouse's sister is also called your sister-in-law. Your sibling's husband is your brother-in-law; your spouse's brother is also called your brother-in-law.
In Marathi, brother's wife is called 'vayni'
Your brother's wife is your sister-in-law.
That would be your great-aunt, by marriage.
if your wife's brother is your brother in law, his wife is your sister in law
Yes
You're wife's brother's wife is your sister-in-law.
The husband's brother is a brother-in-law to the wife. The wife's brother is a brother-in-law to the husband. However, the husband's brother is not related to the wife's brother.
A hoe.
no
tecnically nothing
aunt
A majority of men do not hate their brothers-in-law.