brother-in-law:
(plural: ‘brothers-in-law’; female: ‘sister-in-law)
a man (L) with his wife (M) and his brother-in-law (R)
the brother of one’s husband or wife;
the husband of one’s sister;
the husband of the sister of one’s husband or wife,
a woman (L) with her husband (M) and her sister-in-law — husband's sister
My brother-in-law is a police officer, and whenever he pays a visit, he comes up with some interesting real crime stories.
Most husbands hate their brothers-in-law because they (the brothers-in-law) come to the aid of their sisters when there is an argument and help their sisters win.
In some societies, it is the brother-in law’s responsibility to attend to all the needs of the groom at his sister’s wedding.
The plural of brother-in-law is ‘brothers-in-law’, e.g. I have two brothers-in-law., and the possessive case form of brother-in-law is ‘brother-in-law‘s‘, e.g. This is my brother-in-law‘s wedding suit., and the possessive case of the plural form of brother-in-law is ‘brothers-in-law‘s, e.g. These are my brothers-in-law‘s cars.
