An incestuous relationship is one involving sexual intercourse between two members of the same family, for example a father and daughter, or a brother and sister.
例句
They accused her of an incestuous relationship with her father.他們指控她與父親有亂倫關系。
ADJ-GRADED
狹隘排外的;小團體的
If you describe a group of people as incestuous, you disapprove of the fact that they are not interested in ideas or people from outside the group.
例句
Its inhabitants are a close and incestuous lot...該地居民緊密抱團，狹隘排外。Hospitals are very incestuous places.醫(yī)院是非常狹隘排外的地方。