C2 adjective /ˌmɔːrɡəˈnætɪk/
morganatic
matrimonio morganático
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.
El príncipe entró en un matrimonio morganático con una plebeya.