Concubine

/ˈkɒŋkjubaɪn/

Modern equivalent

Concubine; a secondary wife with lower status

What it means

Noun referring to a woman who lives with a man in a relationship similar to marriage but without full legal or social status of a wife

In the KJV

And it was told David what Rizpah the daughter of Aiah, the concubine of Saul, had done.

2 Samuel 21:11