consort
Definitions
A wife, husband, or companion, in particular the spouse of a reigning monarch.
To habitually associate with someone, typically with the disapproval of others.
A small group of musicians performing together.
Examples
The queen was accompanied by her royal consort during the state banquet.
He chose to consort with people who did not share his values or principles.
It is widely rumored that the prince will soon name his long-term partner as his official consort.