clandestine, secret or furtive
The backstairs (stairs at the rear of a building).
In a manner that disagrees; dissenting; discordant.
One who disagrees or dissents; one who separates from the established religion.
Sometimes Dissident: in the kingdom of Poland, the name for Christians not part of the Roman Catholic Church.
A person who formally opposes the current political structure, the political group in power, the policies of the political group in power, or current laws.