glut, leftover, overabundance, overdose, overflow, overload, plethora, remainder, superabundance, superfluity, surfeit, surplus, too much
clandestine
angle
visa
Undisclosed and unknown are synonyms for secret.
contribute
hide a secret or emotion
supply, provide, furnish
Surplus?
trustworthy or private
enemies
Another word for supply and demand is "market forces." This term refers to the economic factors that influence the availability of goods and services (supply) and the desire for them (demand), which together determine prices in a market economy.
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.