technical 术语贵不传贱的（社会地位较低的一方或其子女不能继承对方的头衔或财产） in which the title or possessions of the partner who has higher social rank will not be passed on to the other partner, or to their children
(of marriages) of a marriage between one of royal or noble birth and one of lower rank;valid but with the understanding that the rank of the inferior remains unchanged and offspring do not succeed to titles or property of the superior
morganatic