contubernal

Etymology
From, from , from +. More at.

Adjective

 * 1)  Living in close proximity (as though sharing a tent); intimate, familiar.
 * 2)  Of a relationship between a male and female slave: sexual in nature and somewhat similar to marriage, but not formalized due to the parties being legally unable to marry.
 * 1)  Of a relationship between a male and female slave: sexual in nature and somewhat similar to marriage, but not formalized due to the parties being legally unable to marry.
 * 1)  Of a relationship between a male and female slave: sexual in nature and somewhat similar to marriage, but not formalized due to the parties being legally unable to marry.