The feminine version is wife, while partner and spouse could also be acceptable, for they're unisex marital statuses.
son in law
A widower is the name given to a husband who has lost his wife.
Doctor is a neuter gender
Opposite gender of Filipino: Filipina
Clot is not gender specific.
Opposite gender of a Filipino: FILIPINA
Husband is the masculine gender for a spouse.
The opposite gender of farmer is farmeress or farmwife.
The opposite gender of fraternity is sorority.
An emperor is the opposite in gender to an empress.
The opposite gender for Joseph is Josephine.
The opposite gender of giantess is giant.