C2 adjective /ˌmɔːrɡəˈnætɪk/
morganatic
морганатический брак
Meaning
relating to a marriage in which one partner, usually of lower social rank, does not share the titles or privileges of the other
Example
The prince entered into a morganatic marriage with a commoner.
Принц вступил в морганатический брак с обычной женщиной.