Sister-in-law describes a female.
Brother-in-law describes a male.
Sister
The opposite gender of brother is sister. While a brother refers to a male sibling, a sister refers to a female sibling. Both terms are used to describe familial relationships within a family.
son in law
Sister-in-law describes a female. Brother-in-law describes a male.
Doctor is a neuter gender
Opposite gender of Filipino: Filipina
Clot is not gender specific.
Opposite gender of a Filipino: FILIPINA
There isn't an opposite gender of farmer. A farmer can be either a male or a female.
An emperor is the opposite in gender to an empress.
The opposite gender of giantess is giant.
The opposite gender for Joseph is Josephine.