concubine
noun/ˈkɑŋkjəˌbaɪn/
Frequency rank: #15,398 most common English word
Meaning
A woman who lives with a man and has a sexual relationship with him but is not his legal wife, often in a lower social position.

Example sentence
The emperor kept concubine in his palace, separate from his official wife.
Synonyms & related words
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