Definitions of common-law wife
a woman who is not officially a wife but is considered to be one in some countries because she has been living with her partner for a long time
The millionaire's common-law wife has claimed half of his assets.
There are multiple definitions - click on the translation that matches your context.
konkubina means:
rzeczownik
full
noun
a woman who is not officially a wife but is considered to be one in some countries because she has been living with her partner for a long time
The millionaire's common-law wife has claimed half of his assets.