clandestine
angle
visa
Undisclosed and unknown are synonyms for secret.
hide a secret or emotion
trustworthy or private
enemies
I do not know the answer but i am pretty sure that they they relate in working together in secret but within no secret. So i THINK that the answer is working together with another person but within no secret.
A secret agreement to perform an illegal act is called a conspiracy.
I dont know but in spanish is "Sociedad Secreta"
assignation, a secret meeting.
I saw that on either ebay.com or Amazon.com last week when I was searching for another movie that had the word Secret in the title.
The 50 cent word as we used to say would be the French one 'ARGOT'. A 'cant' would be another term for secret lingo. ...innuendo, slang, encrypted sentences, a riddle may be others.